So he's the idiot, there's no point in fighting over something so stupid. Maybe your brother watches violent content or has suffered from that.
It's not normal for him to be so aggressive.
I'm so sorry you're going through a difficult time, I've had them too. It's sad to know that someone is feeling bad, but if you're feeling bad or alone, I'll be here to support you.
I hope you're doing very well, maybe a family isn't so functional but it doesn't matter, we love you very much, I support you, if you feel bad, tell me, trust me.