It sounded as if you calmed down a bit after writing the first post. So that's good.

Bottling up your emotions only makes you angrier until one day you explode and hurt yourself or someone you may care about. You should consider looking into finding another therapist. Maybe the one you had before wasn't the right one for you. It can be a process, but it's a step in the right direction and better than trying to cope with it yourself. Have you thought about looking into anger management? That might help. And one on one sessions may be better than group sessions.