Clock - like Candu says, you are already doing some good things to deal with the anger. i think another needed component is - being heard, understood and validated. it is important to not just send our ranting and expressions of hurt - because that is what usually causes the anger - feeling violated or disrespected in some way - into a void. there needs to be a human ear and brain and emotional connection there to receive what we are sending in order for us to feel better. that is what you are doing here.

i hear you, man!
i agree with you!
the situation sucks!
and you have the right to feel abused by it! (that for me is the biggest trigger - when someone makes me angry it is subconsciously reminding me that i am/was a victim.)

hope this helps. is there anyone near you that you can vent to? that might be helpful. someone who will listen and tell you that your feelings are justified.

A man talking sense to himself is no madder than a man talking nonsense to not himself.
Or just as mad.
So there you are.
Stark raving sane.
- Tom Stoppard, Rosencrantz & Guildenstern are Dead