Mm, I don't know really. My experience with MOBA overall is that the community is extremely toxic, in a way that doesn't really show in other game genres. There are a couple of things in the MOBA-genre that works for a toxic environment. The foremost are probably: Casual players vs elitist gamers While the hardcore gamer puts an effort into fitting the correct role, buying the correct items, overall playing the correct way to win, the casual player might have other goals for their gaming session, like having fun. Or as penny arcade puts it: Penny Arcade - The One True Way Time investment A MOBA match can take up towards 40-60 minutes. If you get stuck with bad teammates in an FPS, you can always just leave. If you leave a MOBA game, the other 9 players have a reduced experience and you're, in most games, penalized. These make for a pretty toxic-inducing environment which is built into the core game mechanics.