To be honest, I think that any group where you're basically throwing completely random people together is going to be full of bullshit because a group is only as smart as the dumbest person in it and there are some dumb MFers playing online games.
Personally, I mostly avoid voice chat in online games because I just don't like it. I don't even like telephoning people I know, let alone complete strangers. Something about being able to hear their voices without seeing them, I guess?
Either way, I've experienced 'toxicity' in games before, people throwing out slurs and whatnot, but 9 times out of 10 it's coming from a cunt and I'm just gonna mute them. I am here to play "video game", my guy, not listen to your fuckin' thesis on why slurs are the best. Or your shit music choices for that matter.
Do people still do that shit? Blast crappy tunes from their spotify over their microphone? It was a staple of online chats back in the day IIRC.