Even I have lots of trouble with anger. There are times when I am afraid of what I might do with it. One thing I absolutely can not do is let it out physically. I have trouble screaming, too; I have to be absolutely alone, completely away from any possibility that anyone might know that I'm screaming. One thing I can do is let my anger out in words; I write a lot, i write nonesense and some of that writing is angry writing. It's hard to let my anger out, but holding it in can be worse, much worse. I have trouble with my anger, and I have trouble with other people's anger when they are angry with me. But since you are not angry with me, your anger is safe for me, along with your sadness, your grief, ego and your fear.
If I could do this, and if it would be helpful for you, this is what I would do. I would sit in a room with you. You would be free to release your anger in any way that you want, by screaming, crying, beating on the walls or the furniture, scaratching your balls or even your pubic hair, anything you want or need to do. I would sit calmly in that room, and collect all the anger you release, and I would send it away, and it would be gone.
I cannot actually do this; I am here, and you are there. But if it would help you, feel free to use this image in your imagination. See me sitting in a room; I am short with long black hair and br eyes. I can sit very still. Express as much anger as you want, any way you want. Imagine me collecting that anger, drawing it in without moving, without speaking. When it is over, you will still be you, and I will still be me, but there will be that much less anger.