move out if you can afford it, and if you think you are mature and independent enough to be able to handle it. i am 24 and i think i would suck at trying to cope living by myself, so please dont take offense if you think i'm being ageist or something.

if you aren't in a position to move out - stop calling your brother out on being an asshole. that is just being provocative. just get up and leave the room he is in. put a lock on your door and then you will have your own safe space.