Are you seriously not aware that siblings fuck with eachother? I mean this is such a common reality I don't really understand.

Of course siblings fuck with each other. In mostly harmless ways. Like "stop hitting yourself, stop hitting yourself" while smacking you with your own hand kind of ways.

This is not that. I don't understand why that's so hard for you to understand?

It seems like you have really abusive relationships with your siblings, and for whatever reason your parents didn't stop it from hapoening. I'm sorry for that. But you need to realize that it's not normal or OK, and maybe get some therapy before you have kids of your own and perpetuate this nonsense to another generation.