Parse isn’t what made WoW toxic, but the game design did. WoW is a competitive game. It has an esport scene. Real money and sponsors are involved in world first racing & arena PvP.

WoW is actually pretty chill if you play it casually (normal/heroic difficulties and even early mythic+ keys). People don’t waste their breath yelling/complaining at these levels of difficulty. It’s when you join the top levels of difficulty where people will start demanding more of you (As they should be).

Meanwhile in FFXIV people complain about other players in expert/daily roulettes