am i just overreacting? :0

so like, first quarter and they were all fun & welcoming. (im a transferee btw) i got added into groupchats and friendgroups. it was like love bombing but platonically, like between friends. i even got into a trio, one narcissistic, ungrateful, complaining 24/7, and self-centered, the other a people pleaser, has strict parents, has no personality/originality, does anything her parents want her to do, i could FEEL she waz so happy inside whenever either me or our other friend failed any activity, and lets everyone step all over her. so like, i shut up about their annoying personalities, cuz i could quite literally FEEL they'd be the only ones i could stick with until the end of the school year. dayz passed & we were tgt every break time & dismissal. it waz fun yeah, and sucking up my dignity just to hang out with them was 28% worth it. then, periodicals, grades comin' out, and it waz second quarter. the very MOMENT i stepped into that classroom, it waz so loud, but STILL felt gloomy. it waz still good that time, but in the middle of it all, GIRL. that was when everyone kept their distances to ANYONE that wasn't in their original circle of friends (last year), but that excludes the dudes of course. because the system is (to them):

old student daz a guy: okay, sometimes annoying, anything they do is justifiable (0.5% of them are weird and friendless)
old student daz a girl: 80% are problematic, weird, friendless, and excluded from everything, while 20% are popular cuz seek male attention or they're naturally social and smart

transfer daz a guy: okay, sometimes annoying, anything they do is justifiable or they could be the quiet, anti-social, fine shyt type but still has trash personality under their propaganda (has higher chances of dating someone) or maybe someone with many cases from their old school, but that's okay cuz they a man 
transfer daz a girl: 86% have barely any friends cuz their personality differs from the norm the old students created (me), while the remaining 14% are the ones who are smart and socially acceptable

so in short, only the attention-seeking people are part of the friend groups now.

and my problem here is; they're all SO irritating (ALL of them). they don't think about their actions and how it might harm someone, they bulldoze their way into quite literally EVERYTHING and expect everything to be the way they want it to be.