Sharing the home with an abusive sibling is it worth having a place to stay? ?

I live with my parents as a socially avoidant, loner without a job and so does my elder brother who is also jobless.

It's a strange family my dad doesn't talk openly and is emotionally unavailable, when he talks he only talks about himself, He gives us free money! Also tries to influence loyalty based on this reward system. My mother is emotionally immature and socially dumb.. She is the only one we could talk to but it is a wild ride she is inchoherent and also is very unintentionally hurts people with her conversation skills pretty bad. 

Then there is my elder brother extremely neurotic, always suspicious, has been spying in everyone at home overhears others conversations, bullies weak and helpless one. Extremely selfish and violent in a evil way treating animals badly, helpless people in inhuman ways. Laughs when people are helpless and weak. I'm shy, quiet, passive aggressive, weak and too sensitive and of no use socially with low self esteem with no friends which my elder brother opposed me bringing my friends home or having any friendships by humiliating and scaring me.

Now I'm 35 and he is 38.. Parents are getting old I live with my parents home have been housebound for years with pathetic work history. I have had enough of my elder brother.. I want to leave but being friendless, jobless and no social contact I get discouraged to make a move. Also my parents are aged and ill I don't know how to handle any of this constant harrasment.