Seems like you have violent tendencies. Normally I'd recommend further therapy but
a bullet to the head a more interpersonal method would probably work best.
Letting out anger from time to time may seem fine, and 'venting' can seemingly cleanse when in negativity. In short, however, the catharsis theory--becoming happier and less depressed/aggravated by vocalizing or 'ranting' about negative thoughts--is false, as doing such an action often leaves one even more distressed than before.
It is imperative, therefore, that you begin to strive to find more suitable ways to deflate and express feelings. A humanistic, person-centered approach can help in the long run. I'd gladly volunteer myself to undertake such a proceeding.
From what I have gathered you're looking for someone who can empathize with you well and give a good understanding and diagnosis of your situation. And along the way, I'm sure that your friends will be supporting you. Just so you know, it's a long battle, but together we can vanquish your raging tendencies.