I hate my ex. How do you move on?

I was with my ex for six years. I was always there for him even when he didn't treat me that well. I never thought it would get to the point that he owes me thousands of dollars (that he won't repay), hold hostage a boat I stupidly bought and he got the title in his name, destroyed my credit, him telling me he wants to beat me, and soon a custody battle. He never cared about spending time with our daughter when we were together and to hurt me he uses her. I feel stupid that I trusted him and now he moves on with his life and doesn't understand what I'm so mad about. I hate him. Anyone else have experiences like this? I still have to see him on a regular basis. How do you move on? I am so resentful.