First of all, are you being objective?  emotional?  Is the so called abuse because of their frustration with your behaviour?  The shaming in front of other people  ... were you actually guilty of what you were being accused?

70-80 years ago parents followed "don't spare the rod" .  This extended to verbal also (but that usually only meant once or twice) but after that a stern look was usually sufficient.

Do you think your parents are behaving a certain way just to be mean?  That's an important question.

If you're in your mid 20's, you just came out of the trying teens.  You may think you were an angel but how did you respond to their "abuse"...were you silent and submissive or did you respond in kind?  Did you rebel? 

Today the word "abuse" is thrown around for every little thing that hurts our little feelings.

I'm not trying to judge you, but you should judge yourself.  You may be justified in your feelings on all counts, some counts, or no counts.  Only you can decide.

To be truly Catholic, follow the example of the saints (and there are many).  When falsely accused they kept silent and let their behaviour speak for itself. (and they probably offered it up).

You may feel you have the "right"  to clear your name (as Lad says) but is it truly going to resolve the situation or make it worse?

You are welcome.

Allow me to express my thoughts on your situation once again, and please consult some good priests or some wise friends before taking your decision.

In my opinion, you should not go back to living with your parents, or with just one of them.

Somehow, you were able to move out once, and, from what I can infer, you are financially independent from them. If you move back with them, you will be under their "territorial dominion" once again, since "my house, my rules". It will ruin your mental heath.

If now you sometimes feel like you want to die, once you go back to living with them, you will feel like you want to die a thousand times a day.

Many people would give anything to be in their 20s again and be able to make better life choices. At your age, you can discern a religious vocation, you can discern a married life vocation. You can do anything. You should value this, and not risk going really down into depression by going back to a situation which you have already freed yourself from.

If you already pray five rosary mysteries a day, start praying ten. If you already pray ten, start praying all fifteen. Our Lady will not abandon you.

I guess my situation is a bit different. I'll admit it's actually one of my parents and she is not working nor actively seeking work and just plans to live off her savings and me for the rest of her life. That's why it's actually not me moving "back" since I barely had a place called home to start with when I moved out, I didn't have a bedroom of my own, I slept on the couch in the living room. Now this parent specifically is living in a relative's house and had already planned to move in to MY PLACE without ever discussing about with me and most likely will just drive directly to me a show up at my door at some point. I don't know what reason or excuse I can tell this parent to prevent this. I already told her this is just a temporary rental and I may move somewhere else very soon and it'll be inconvenient. But she insists she'll just follow me and move in wherever I move to EVEN IF I GET MARRIED. My opinion was not even asked, as I mentioned, and I don't see how I can not let her in when she just shows up at my door.

Here's something you can try. If you think your mom is going to show up and want to stay, make sure that there is no comfortable sleeping place in your home or apartment. Only a few chairs. You may have to sleep on the floor for awhile, but so will she. Just live like the saints who had very little in the way of creature comforts. She may decide that she doesn't want to live that way - most people don't.

Nope. Bad idea.  Mom sounds manipulative.  Mom will use her savings to buy a bed. Why would anyone want an abusive unholy person into their home to bring in demons?