Writing about it and getting it out in a safe non-violent way is good. I found in my journey my hate was directed at the child (me). I hated her for the mess she got herself into, the way she treated others afterwards, the poor decision she made, how she messed up my adult life and allow her crap to morph and grow and infect all aspects of other relationships. Slowly I've been able to remember more of what she experienced and..understand more of what it was really like. The hate is dissipating. This is what therapy does I guess.