I have exact similar problem. I have big anger issue, even a few years ago, I had hard time controlling it. However ever since I found some hobby that requires some skills, I could calm my temper down these days. I don't play competitive or easily frustrating games. You are on your own to deal with it because hardly anyone will understand it like you mentioned in the last paragraph. Even now being informed of western politics still frustrates me to no end, I take a break from any western entertainment or websites and never try to go any western message board for a few days.