You are an addict, with violent tendencies, but say "...I can handle adult stuff.." but are fine with having a guardian who can force decisions on you, you are all over the place and clearly beating you has made you a nice scapegoat but has done nothing to improve your situation/self worth/behavior, in other words, it doesn't work. Please do be sure your sexual partners know all about your behaviors and do them and yourself the favor of getting tested regularly for blood borne diseases, and STDs---use protection. As you know yourself, violence is a very temporary deterrent.
I wonder what you wanted to be when you were a little child...
How old are the other two and what are they doing with their lives?