why are kids at American school so negative to alt kids?

i will have always been so called a "weird kid" sense i was little. I liked weird things the kids my age wouldn't really like. I liked dolls and barbies but i also loved creepy pasta and just weird shit kids are age now would never find entertaining. In fourth grade i was more into girly things sense i felt forced because my grand ma and friends always influenced it. But after fourth grade i started realizing i hate girly clothes and stuff most girls in the fifth grade would love. Fourth grade was when i realized i didn't have to just lie guys i could like girls and it went throw my mind fast. Past elementary i started wearing more dark clothes and i changed my style a lot. One day i would wear just black but the next day i would wear a bunch of colors.

i found out later this year that kids at my school thought i wanted to kms because of how fast i changed my style. I did but that's past the point. In fifth grade i had horrible mental health but i hide it well so no one really new. Past that point why do most basic because think the second they see a alt person there depressed or there life sucks. I have been told multiple time to kms and that i am a part of the suicide club which I'm not and that's just rude. "Basic" or "normal" kids at American schools make it seem like alt kids are the worst when we aren't we don't do anything and all I've been treated was like trash at school. I hated school all throw middle school because of how i was treated just because of how i have dressed. Anyways this is kind of a vent and I'm sorry but im bored.

Peace out people.