Harness it.  Use it as fuel.  It can be a hell of a driving force if you get control of it.  Rather than allowing it to eat away at you, devour your rage.  At various times in my life, I’ve been as pissed off as you currently are for a host of reasons.  And at those times, I was not yet able to listen to the kinds of wonderful advice you are being given here.  So do what I did -- write about it.  In any form.  For as long as it takes.  But get it out.  You’ll be amazed what you produce.  Maybe it’ll just be for you.  Who knows, maybe it’ll be worth something.  But either way, it will make you feel better.  Even, perhaps, a little calmer.  Which is when you’ll be able to hear the kinds of thoughts everyone else has been kind enough to share. 

It’s just a thought.  I wish you well.  I understand.  Best, Eric