My brother, consistently needed to be looked after because he would get black out drunk, threatened to kill one of his mates the last night I spoke to him, I thought that would only be towards me but I see my brushing it off allowed it to fester. He was a womanizer, a victim, angry, drunk, always spoke over you, always had to do what he wanted to do, always needed to be available.
Honestly I think stepping away has made both our lives much better. I still haven't spoken to him for maybe 2 years now, kind of waiting for him to apologise or at least admit he had a problem. He's better now, having a kid soon with a girl he's dated for 2+ years, I'm excited for him and the family he's creating. I've made huge leaps in my own life too since cutting him off, no kids though, focused on myself.