I don’t. I don’t think there’s a direct line from helplessness to anger. I think it’s just fear of things you cannot control, being overwhelmed with the logistics that accompany a response to any and every possible disaster or inconvenience, and a lifelong weariness built on your own constant vigilance against anything that might marginally worsen your stability and comfort. It’s worry. Constant worry, and your own forecasted model of whatever consequences await should you stop worrying.

If you personally experience anger as a coping mechanism to difficult feelings, I think there’s an emotional regulation issue you need to address and work on. If you’re angry because you feel powerless, it’s probably because you feel more comfortable being angry and use it to avoid the discomfort of feeling small, and that’s your way of reclaiming power. That’s not anxiety, that’s a frightening quality for others to have to deal with, and your pattern of thought shows a willingness to offload the blame for your aggression on external factors. Anyway, I hope you find a way to deal with that, if that’s how you process anxiety.