Not a revenge-oriented person, but really. No need to even avenge ourselves. (1) God is our avenger (2) Bitterness is poison (3) Some people just don’t deserve that place in your life. Hate and bitterness take too much energy that could be put.
I did not happen to learn this a long time ago, only a few months ago. Give it some thought. Turns out to be true. They are not entitled and they will think what they want anyway.