tf2 and tftv is a big enough game/community to attract douches but its also small in comparsion to other games so they have more of an impact and are memorable. its like a small town compared to other games' big cities. ppl remember "toxic" people cause they arent the norm and also there just arent that many people. ppl can also remember beefs and hold grudges from shit talkers in the tiny (in comparision) amount of actual competetive content played easier
other communities like cs and hltv are just so big that itsa given that every single thread and game will contain shitposting/talking or a troll or dickhead or cheater so you just kind of tune it out
sorry for bumperino