But does she have a point when she mentions the lack of charity among some traditionalists. Maybe?
Anecdotal evidence:
20 years ago my family chose Mass attendance at the Fraternity of St. Peter (indult traditionalists) over the SSPX due to the prideful feeling of the SSPX.

... "prideful feeling of the SSPX". Please tell me you're joking. What's a "prideful feeling"?
As mentioned before, this individual defined this "prideful feeling" as having the attitude of "the Tridentine Mass is better than the NOM and the NOM is bad". So that's pride? If you go to a Catholic Church and they say, for instance, that "the Catholic Church is the One True Church founded by Christ, and if you don't become Catholic you can't be saved", to someone who rejects that dogma, they will label this "prideful". Now CAN there be some arrogance, some pride, etc. also there? Yes, most certainly. But that can be colored significantly by whether you disagree with their theological position. "You Catholics just think you're better than everyone else." Answer: "Why, yes, yes we are." ... but you have to be careful to add "but not due to my own merits".
Yes, there can be a greater tendency to pride among Traditional Catholics. Why? Because the posture of recognizing that Traditional Catholicism is objectively superior to the Conciliar religion, and that many elements of the Conciliar religion are bad, from the Mass, the heresies, the sacrileges, etc. ... when you're in that battle it's much easier for the devil to come in there and insinuate the subtle element of "I'm better than you are because I do these things ...", not unlike the Pharisaical attitude. That doesn't make them wrong or illegitimate, etc. In fact, Our Lord said of the Pharisees that they sit in the Chair of Moses and that people should do what they say ... just not do what they do. In other words, they weren't wrong, and the various people who rejected that Chair of Moses were in fact wrong for doing so, but it's all about the attitude. Some succuмb to pride and bitter zeal, but many do not and are quite humble about it, recognizing that were it not for the grace of God, there go I also, and I have done nothing to deserve God bringing me to Traditional Catholicism while not bringing those others. But humility doesn't require saying, "Well, that Novus Ordo Mass, that's OK too, and it's not a bad thing." and "It's not bad to have altar girls and Communion in the Hand." or "I might personally disagree, but, well, that's just my opinion and yours is valid too."
This is the thinking that Bishop Williamson correctly denounced as "nitheness". You don't have to be nice about condemning error. Was Our Lord "nice" when He scourged the money-changers out of the temple, called them a den of vipers and painted sepulchres? Was God being "nice" when He destroyed all mankind with a flood?
When you're in a battle, the very essence of the thing is to NOT be nice ... and we Traditional Catholics have been in a constant battle. Sure, it can feel good and be a relief to some Trad to just go to FSSP Mass and say, "well, no more conflict ... I'll just lay down the sword and fit in, and get along with everyone." ... since constantly having to swim against the tide of the Modern world and of the Conciliar Church are exhausting and tiring, and sometimes it requires some additional exertion, which can be construed by others as pride. But if that's wrong, then you're just surrendering the battle because you're tired of fighting.
Yes, there can be many bad tendencies among Traditional Catholics, but I'm not going to decide what's right and wrong by emoting over these things. It's either right or wrong based on doctrine, principles, and theology. As for these other bad tendencies, it's up to me to be vigilant about it in my own soul and to fight it and not succuмb to it.
We had all those people leaving the Church because of the various predator priests, etc. Lots of people use "bad people" in the Church as an excuse to leave the Church. But that's all based on emoting, and very often it's just an excuse to rationalize what you wanted to do for other reasons. "If God tries to condemn me for leaving the Church, I'm going to say to Him ... how about those predator priests?" To which God will respond, "That's not why you left. You wanted to get divorced and remarried. And the existence of sinners is actually part of the Church's doctrine, and you know full well that being Catholic doesn't guarantee sanctity. You made this up as an excuse to justify yourself. Depart from Me."