I wouldn't say it's due to WoW players. I'm a former WoW player myself, of what some would have called Elitist since was in a server first guild and top 25'ish world guild. (Simple Math, Andorhal)
I think people are just seeking abuse, if I am honest. They see a comment and immediately assume it's in the negative format. I'm one of those gals who doesn't care what people say, words being words and what not. Can insult me and I'll be like, meh... Who cares. But there's quite a few who only see the negative, concentrating on it scarily, when the positive is far more available and given.
I think the worst things I've encountered in this game was a grumpy roleplayer that jumped on me since I didn't use their pronouns lol A few times someone wanted to boot DPS or a healer since they felt they were slowing down the group, my reply being who cares it's just a dungeon.
So, if you concentrate on the negative, that's what you'll find imho. If you just act like a normal person, you'll rarely see it.