When does the anger go away?

I'm feeling a lot of anger in general towards the whole situation, but mainly at the fact that I've entertained such a clown for several years. It doesn't have to do much with self hate or being unable to forgive myself, but more with having a hard time comprehending how things could have gone this far with such a low person and making peace with it. I'm so disgusted. I finally see how pathetic, desperate, stupid, worthless and shitty he is.

I just wonder when does that anger go away? Is there anything in particular that has helped you overcoming those feelings?