For years, I raged against people who didn't treat me right, but then I realized that I chose those relationships, of my own free will, and stayed in them, even though I was free to leave with very little or no consequence. And then, was I ever mad at myself!
That was harder to handle than I rage I felt towards the other. What helped was self-compassion, and remembering that I'm a human being, and that human beings make mistakes.
At first I was mad at you, but now I'm mad at me for having put up with you.