The problem with anger is that it feels good for a while and the more justified your anger is, the better it feels.
So you begin looking for new reasons to be angry, for corroboration from others, and for more justification to fuel your anger.
Eventually, anger consume you, blinding you to everything else and shrinking your world down to the size of itself.
By the time you realize your anger no longer serves you, that it stopped feeling good a long time ago, and that it brings you more pain than pleasure, you find that it is all you have left because anger is selfish; it takes everything.
You can keep your anger or your life, but not both.