i couldn't help it and felt only hate towards his big bro

You know what they call that? Tsundere (〜￣△￣)〜

Haha or maybe just a fucking creepy, digsusting sadist

nope, it doesn't called that cause if u want to say that he's brother is tsundere then he have to show a warm side of him
but he only showed bad side so no

yuuup, that's it