Listen, I know that family is a hard subject. And maybe it's easier for me because my parents divorced but when it comes to siblings, they're just like friends. You have no responsibility towards people that treat you like shit. I rarely talk to my sister because she is condescending towards me. I just don't want to see her anymore because it upsets me that I can try so hard to get my life back on track and all the mental beat downs get too much. I sometimes feel like no one is proud of me. But then I just think about how high they put the bar and I just go about my own business. Your brother is indeed wrong, it's up to you to realise that it doesn't matter what he does. It's your life, go and do something you love doing. That will make you sleep at night, trust me ;)