My brother likes to yell at everyone, but I have actually noticed he doesn't really do it to me anymore. Because I won't put up with it. I'll walk out of the room. And I also rarely see him. The last time I saw him was Christmas 2019 before Covid. He has always treated everyone badly, but the rest of the family allows it. I don't.

I think it's good that you are enforcing a boundary with your sister.