The gaming hentai community.
You would think but hot damn, I have seen people rage if they see Ps5's tits bigger than Series X and vice versa.
As for OP. Every fandom has toxic people including ones that you would think are innocent cause eventually, even those get toxic. But that doesn't mean everyone in that community is a terrible person though as there are plenty of good people.
So if you are looking for a fandom that has no toxicity, good luck. Cause even if one doesn't right now, eventually it could like how swapnote on the 3ds had an incident in Japan where minors were sharing Friend Codes with strangers who had exploited the messaging service to allegedly exchange pornographic imagery.