>>82404876 (OP)
Outgroup bias being constantly fed by outsiders being massive cunts.
In third grade a friend of mine started a pokemon club, i was invited and for a few weeks everything was fine, until a group of annoying sporty popular kids joined and started scamming people. they would funnel in kids from younger years specifically just because they where more gullible and scam them. this resulted in pokemon getting banned because kids where going home crying after they traded their mega EXs for holographic trainer cards not realising they where scammed.
Bayblades, similar thing accept instead of trading them the newcomers bought the older bayblades which where almost unbeatable with the newer bayblades, ruining the fun for everyone who didnt buy the older ones.
the next year we played a war game in the forest behind the school, at first it was fun until more people joined, the goals of both sides changed, causing people to change sides, and after that it just got boring because people kept changing sides. eventually and actual fight broke out and the teachers shut the whole game down.
eighth grade, i joined a table with a few guys and mostly girls, we gatekept the group and for a few months it was perfect and i even started getting close with a girl i liked. Next year more people where allowed to join, those people then kicked me and most of the original founders out of the table and that golden age never came back.
finally, Anime. I've been watching it since I was 8 years old and since the covid pandemic the community has been filled with normalfags that try to police everything.
Those are the four most egregious cases, but through my entire life ive been finding niche communities, getting attached to them, only for them to be invaded by annoying faggots and ruined. Im so fed but that at this point anyone who is not in my immediate circle with simmilar interests i immediatly dislike them.