Rimworld has a fairly non-toxic community going for it. The closest thing to toxic ive seen in the rimworld community was people arguing when the first dlc came out. Some people claimed the dlc was basically just a couple mod ideas "stolen" by the game dev and made using the official dev tools instead of mod tools and the majority of the community disagreed with that assessment.
One thing to note about rimworld tho, its a singleplayer game which probably helps and its a single player game where insane things like making a cannibal colony that doesn't waste the leather from the human meat they eat by turning it into human leather cowboy hats is a completely possible and heavily memed thing you can do in the game. That probably has something to do with the low toxic level of the community that ive observed.
One thing to note about rimworld tho, its a singleplayer game which probably helps and its a single player game where insane things like making a cannibal colony that doesn't waste the leather from the human meat they eat by turning it into human leather cowboy hats is a completely possible and heavily memed thing you can do in the game. That probably has something to do with the low toxic level of the community that ive observed.