I was not thinking so much about grades but rather the gang part of your story. Honestly I suspect you are quite smart, but my point was that even if you are dumb as a doorknob, you can make it in life. Your problem is not lack of ability but lack of focus and a problematic self-perception.
You still have not told us what would you be if you were smart, lucky, handsome, you have it. That's the starting point.