Why have I become a hateful person?

I wanna say its cuz i haven't had a friend in like over a decade and cuz i have no family cuz my parents are abusive and i had to run away and cut all contact to save myself and i was homeless because of it and then went on to be abused at work by many mrn mentally abused and toyed with. For no reason. Then i keep having roommates year to year who are assholes to me. I have become a person who outside is nice and docile but inside i have hateful thoughts at the drop of a hat.

Why have I become a hateful person?
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