any tips?
When someone is making you rage, and you feel you are raging, stop a moment and imagine there would be someone, for example your mother or father, who asks you what you are raging about. Ideally your parents never played computer games at all, and consider it a big waste of time. Imagine you would have to explain them what makes you rage. And then think about how it would sound like, and how people would react.
Just make yourself conscious what you are doing there, when you rage about someone on the internet. Think about how much it influences your life, e.g. your relationship, your family, your friends, your job, your other hobbies, etc., and ask yourself if it's worth it.
That "from top" view really helps a lot.