Love is beautiful, and hate is destructive.
During a breakup, when we lose something that we love that means so much to us, the natural reaction is to start to hate them. We blame them for putting us through this pain. Hate is not good. Nothing good has ever come out of hate.
The best thing is try and UNDERSTAND...what is happening, accept that you can't control everything, and face every challenge that comes at you.
Of course, if your ex is a cheating, lying, manipulative person.......a little anger is to be expected