Please don't get angry with me for saying this, because I know this is incredibly hard to do (and it seems like it's impossible), but it is possible.
I dealt with my anger by... forgiving... It was so... incredibly hard to do, and I still get angry sometimes, but mostly I am just saddened but the all evil of it. I honestly don't know how I did it, I was just sitting there and... let it go... I let it all go... I felt everything I had felt since I was 6 years old just slip away from me... It was an incredible release.
I honestly don't know how to tell you to get to this point, since I don't know how I got there myself, but I want you to be able to experience the feeling I felt when I forgave.
It takes a long time, like I said, it me years to get to that point, but when it finally does happen, you will feel much, much better.
It sounds like you might be off to a good start of releasing it, though. Keep it up.