I've dealt with anger a lot, tempted by seeking revenge....a lot of times, thought I didn't do it...I tried other ways to deal with it and let it go. For me the first step was to understand the behavior of others (who have done me harm) and realizing where their behavior comes from, trying to view it from their perspective in a state of 'depolarization'(see also https://youtu.be/oT6CjWIy0n4?list=PLWL-f1YBw48NKF1PasvuAM5oyiT73A12i for info about depolarization)
The next step was forgiving them, which is very difficult but in my opinion necessary if you want to let go the anger. You can write down the names of the ones who have done you harm, and also write on the paper 'I forgive you'.You can do this as many times as necessary while visualizing all the things they did that made you angry. You can burn the notes with a (black) candle in a ritual.
Also I've read a story I'd like to share:
One day the Buddha was walking through a village. A very angry and rude young man came up and began insulting him. "You have no right teaching others," he shouted. "You are as stupid as everyone else. You are nothing but a fake!"
The Buddha was not upset by these insults. Instead he asked the young man, "Tell me, if you buy a gift for someone, and that person does not take it, to whom does the gift belong?"
The young man was surprised to be asked such a strange question and answered, "It would belong to me, because I bought the gift."
The Buddha smiled and said, "That is correct. And it is exactly the same with your anger. If you become angry with me and I do not get insulted, then the anger falls back on you. You are then the only one who becomes unhappy, not me. All you have done is hurt yourself."