I dont know what it is. It makes me sad.

My brother was diagnosed with type 2 diabetes 6 years ago. Recently, he got diagnosed with gouts. The problem is not his health condition. The problem is his behaviour. He is always disobedient whatever we advise him about. If we try to tell him not to so something, he will specifically do the particular thing. He acts clingy and won't let anyone be at peace. Elders can't scold him as he starts acting mad or starts crying and creating a scene. He is always negative towards life and he keeps talking about dad whom my mom was separated from years back. He has had two failed marriages because of his short temper and impatience with people. He has had short lived friends and most of them are rowdy men. I am having a problem understanding my brother's behaviour. I really think he has a problem and I am not able to understand what it is. All I want is to cure him. P.S: He drinks a lot of alcohol inspite of saying not to. It makes me sad.