My brother is mentally and verbally abusive towards my parents

My brother is abusing my parents verbally and mentally. If I involve he does it with me too or throw his tantrum at my mother. He breaks everything if he doesn’t get. My parents send me abroad for study now I’m back he wants to go to abroad but he doesn’t have enough grades for it. If I try to explain him he speaks rude to me. He doesn’t pray, we tried. He does do substances and if he doesn’t get money from my mother he breaks everything. I tried to help my parents monetarily as I could. We ask Allah for hidaya but I don’t want him around my parents and in the society we are living we can’t even disowned him or get him out of the house. Sometimes I get fed up and ask Allah if he stays like this grant him death otherwise hm give him hidaya if he will get better for my parent.I can’t lose my parents for this guy. Is it sin for me to pray such thing?