Thank you for your responses.
I should admit that I looked at the Serenity prayer and loved it very much. It contains everything I need when in distress. I am practicing Buddhism, and this helps me a lot. The main point I love there, you should love all people equally, and this helps with my anger issues.

I believe it is okay to feel angry, as long as that emotion doesn’t consume you completely. Mine does. I can not allow myself to be angry even for some time, or provoke angry thoughts, they are growing by themselves a lot, and no way to stop this.
My therapist said I have a personality disorder, but not sure which. I hope I will find this one day and be able to work with this.

I met other people, that agreed with me that anger is destructive, but not a lot. Among the hundreds of comments, just a few.
I think acceptance and forgiveness are different concepts. Acceptance keeps you to yourself, staying calm and strong. Forgiveness is a method of feeling better. However, there are some situations in which you may not be able to forgive or even accept what has happened.