I'll preface this by saying every fanbase has its bad eggs...But there are definitely fanbases that seem to attract far more vile people than others.
I would say Undertale and FNaF but honestly, since nobody really gives a crap about those games these days and they're no long everywhere you look, I haven't noticed anything from their fandoms that particularly grinds my gears. They were basically the "awful fanbase of the month" until everybody moved on to the new cool thing, presumably Fortnite.
The Sonic fandom is one that continues to make me cringe though. Some utterly weird and disgusting stuff comes out of that cesspool. I like the Sonic series, but I do my absolute best to avoid the community for it. I feel that more of the Sonic games would have sucked less if the fanbase didn't just blindly accept every game with unconditional love and abuse those that said otherwise.
Even worse, the Nintendo fanboys continue to be, as far as I'm concerned, one of the most vile and cancerous fanbases out there. I've come across pieces of trash from every platform preference over the years, but the Nintendo's fanbase never ceases to surprise me. Obviously as a Nintendo fan myself
(on a forum based around a Nintendo game), I know it's not everybody, but wow...Nintendo fans are some of the biggest bunch of hypocritical, close minded and abusive "gamers" I can say I've ever had the displeasure of communicating with.
I have to say smash: melee elitists, waluigi fans (who harass sakurai) and overral people complaining about the characters
This goes along with what I've said. Anybody who even thought about harassing Sakurai over friggin' Waluigi not being a playable character is utter scum.
