So, two years ago, I was exposed to the world of doctrinal and dogmatic Christianity, which was different from trying to determine the existence of God through philosophy. Now I was convinced there was a God, and suddenly I care when I hear fundamentalists say that I'm an idolater, and that I'm in the whore of Babylon. I have OCD, too, so this was the tipping point of my obsessive nature. I kept hearing John MacArthur say that Catholicism is the kingdom of satan. I eventually confused myself into thinking the devil was greater than God, and I convinced myself I blasphemed the Holy Spirit, and in my despair, I felt this presence inside me that seemed like it was pulling me towards the devil. Every time I saw satanic things on the internet, I would get excited, and I would catch myself calling him Lord. I kept thinking of Jesus, but I'd suddenly change Him into the devil in my thought process, and the devil thought seemed to draw me towards satan, and I couldn't shake it.

I eventually despaired so much that I agreed to sell my soul for the return of my heterosɛҳuąƖity, which was another story rooted in perpetual OCD doubting, and self bullying, and after this deal, I'm suddenly finding girls to be attractive again.

But soon, I regretted my deal with the devil, and I've been turning to God, asking Him to forgive me and make this all go away. I've done everything I can. I pray the rosary, but I have temptations to pray to the devil for things, because even though I know that I will go to Hell if I do so, it is hard for me to shake it off. It's like Frodo and the Ring in Tolkien's Lord of the Rings series. I try so hard, but I doubt that God will answer.

Could God be angry with me and is He sending this as a form of chastisement? Why is He letting the devil take control of me?

God is not angry with you if you pray the Rosary.

Keep praying the Rosary and talk to a traditional Catholic priest.

God does not test you beyond your powers.

Are you going to Holy Mass?

Have you been baptised?

Do you go to the Sacrament of Penance?

Pray the Rosary.

When you are tempted make the Sign of the Cross, thereby invoking the Blessed Trinity.

Whatever you do, don't stop praying the rosary and don't listen to protestants.

I wish I could do that, but I keep thinking that I'm putting the mark of the beast on my forehead, according to fundamentalists (blessing with right hand, too). And I'll change Father, Son, and Holy Spirit into satanic equivalents. I can't escape from this mindset

You do have to start by accepting Catholicism as the truth.

If you're still giving protestant heretics any heed, you're not there yet.

I'll tell you, though, that only Catholic priests have any power over the devil. Protestant ministers are the devil's toys.

If you don't want to be horribly miserable both on earth and throughout eternity, embrace the Catholic Faith wholeheartedly and do your utmost to leave behind BOTH satanism and protestantism.

Only the Catholic Faith can save you.

Well, you have an obsessive compulsive tendency, and this combined with temptations to blasphemy, it is troublesome yes.

The devils torment many people with blasphemy. They also tempt to fixations. Fixation and blasphemy together is tough. Basically they speak blasphemies to people mentally, and so people think these things are from themselves, but they are from the devils.

And they try to trigger blasphemous thoughts in the mind of the speaker, since you are obsessive compulsive the triggers of your imagination for these things are very easily pushed by them. It is like hmm, a song that catches in your head you cannot get rid of, they can try to trigger these things, to lead you along.

FWIW. Now a person who is more average and self aware/controlled when presented with these things will more rarely get carried away and give into even thinking the thought through, I think. But the obsessive compulsive type gets carried away with every thought that appears in the mind.

Perhaps it would help if you contacted a priest dedicated to mental health? There are some in this field. Perhaps through the website Sensus Traditionis, you might be able to find a reference or might be able to get some tips through email.

Generally speaking, if you are having trouble with the demons interfering with your thinking processes, and are having trouble on your own even without their interference, you want to avoid situations that unsettled your state of mind and make it more OCD prone. But avoiding this in a good virtuous way. I can say that computer use, TV use, put the mind in a passive receptive state that is more vulnerable to outside suggestion of all kinds, including demonic, so if you are using computer too much this will make things worse for you, it is not a source of peace.

Also, sin is punished with sin, so if you are watching shows that have blasphemies there is a certain justice in being punished for this, so you must not sin in this way. Give up TV if you watch it. And of course must avoid sin in general, instead living more virtuously.

Make a good confession. Learn to make good acts of contrition immediately after sins, and acts of love of God after this to repair. Saying prayers like this both repairs for sins and makes further spiritual progress.

Not all blasphemy that comes into the mind is a matter of guilt for the person. When the demons are the ones causing it, it is they who are the guilty ones, though we hear it -- we are not the cause of it.

The devil fishes in disturbed waters. Learn to think of Christ and His peace and work towards having a more peaceful mind. Get some blessed St. Benedict medals which the demons can't stand, and say holy prayers with the Holy Names aloud with true devotion to drive them away. Live a pure life and do not think of impure desires.

FWLIW I hope something in this is relevant and helpful to you!

I will try to give a little more info in next post too.

A good confession of course requires the Faith!

Here is from the desert:

A brother was beset by thoughts of blasphemy and was ashamed to reveal them to anyone. Wherever he heard them there were great Elders, he visited them to disclose the thoughts to them, but, being too ashamed to confess them, always returned empty-handed. He frequently visited Abba Poiemn, and towards him he acted likewise, out of shame, without confessing anything.

Abba Poimen realized that the brother had such thoughts and was distressed and would not confess them. One day, therefore, as he was escorting him on his way, he said: "Look brother, you have been coming here for so long to reveal the thoughts yo have, yet when you come, you are reluctant to confess them, and each time you leave in sorrow, since you keep them to yourself. So tell me, what is it that bothers you?" The brother replied to him: "The Devil wars against me to make me blaspheme against God, and I have been ashamed to say so, but now I am telling you." As soon as he related the thought to the Elder, he felt relief.

...

The Elder said to him: "Do not be upset, my child, but when this thought comes to you, say: "I am not responsible for this thought. May your blasphemy be upon you, Satan. My soul has no desire for this." Whatever the soul does not want, lasts but a short time.' And the brother, went away healed.

A brother once asked one of the Fathers about the thought of blasphemy saying, "Abba, my soul is troubled by the demon of blasphemy. Have pity on me and tell me how this has happened to me and what I should do about it."

The Elder answered: "This kind of thought occurs to use because we malign, disparage, and condemn other people; or, otherwise it comes from pride, from following one's own will, from neglecting prayer, and from irritation and anger, all of which are signs of pride. For pride leads us into the aforementioned passions, from which the thought of blasphemy is engendered. If this thought lingers in one's soul, the demon of blasphemy hands one over to the demon of fornication. Oftentimes the thought of blasphemy drives a man out of his mind, and unless he comes to his senses, he will fall into perdition."

...

Question

How is it that the soul of a man frequently inwardly utters certain shameful, unclean, and foul words and entertains similar thoughts, involuntarily and unintentionally?

Oftentimes the soul also utters ungodly and blasphemous words against God. . . Others have even contemplated ѕυιcιdє. . .

Answer

Thoughts of this kind occur to many people as a result of pride. . .

Still others, who are devout and God-loving, are vexed by blasphemous thoughts because the demons envy them; for this reason, even certain holy and virtuous ascetics living in the desert fall into such thoughts. . .

The most irksome aspect of this warfare is that no one who is being tried by it dares at all to confess these thoughts to a fellow human being, reckoning that no one else in the world has such abominable thoughts.

. . .

Well there is too much to type at this point, but the above advice -- turn it back on the devil, live a virtuous and prayerful life, and go to confession this is what follows largely..

I wish I could do that, but I keep thinking that I'm putting the mark of the beast on my forehead, according to fundamentalists (blessing with right hand, too). And I'll change Father, Son, and Holy Spirit into satanic equivalents. I can't escape from this mindset

Common sense tells me that the Catholic Church is not the Whore of Babylon. If you look into the book of revelations it mentions that the whore of babylon is a city. The Catholic Church is not a city....its a Church. Some protestants like to point out that Rome may very well be the Whore of Babylon because it rests on seven hills. There are a few cities throughout the world that rest on seven hills. Jerusalem being one other example.

Also, The New Testament mentions a wilderness that is associated with the Whore of Babylon. The word "wilderness" in Greek has many different translations. It can also mean "desert". I would be willing to bet that the Whore of Babylon is a city in the desert (Middle East) as opposed to a wilderness (more like Rome). The reason I say this is that the ancient Babylonian empire (Iraq) and the city Babylon (a city in Iraq) are both in the desert. Thus, I think its more likely that the Whore of BABYLON will be a city in the desert. And there certainly are not any deserts in Rome.

Keep in mind that your soul is sort of like a Radio transmitter. When you are in a state of grace you are tuned into the God channel. When you fall from that state of grace you are tuned into the devil's channel. When tuned into the devil's channel there are all kinds of demented thoughts running through your head. It doesn't surprise me that you have thoughts like that of which are in your OP. You need to make sure you are in a state of grace. Once you are in a state of grace you should pray the rosary. And keep pushing those sinful thoughts out of your head. The more you keep doing that the more you notice God and you sense His grace more.

I hope you'll go to a priest, if you haven't already.