So, when someone has hurt us, we instinctively want to hurt them back. It stems from a primitive need for self-defense. People try to fulfill this urge in different ways however, or not at all.
Do you bottle up your anger and give the person who’s hurt you the cold shoulder? Or do you hurl a barrage of insults at them in an attempt to get even? Or do you try to get revenge in an underhanded and passive-aggressive way?
When I was little I was taught to do back to the other person whatever they did to me, one day at elementary school during break a kid spit at me and ran away, I ran after him persistently, not stopping untill he gave up, I spat on him and got my revenge, little things like that here and there became part of me untill I found myself with that "an eye for an eye" mentality at 14 years old. At that point it was so subconcious I couldn't recall doing it in some cases others pointed out what I was doing.
That's when I decided to dial it back, however to this day being alot wiser, I believe the greatest form of justice is an eye for an eye, what someone does wrong to another should happen to them in the same way.
If you have a problem with that, it means you have done things to others you wouldn't want to happen to you.
It means you are a narcissist who likes to dish out but can't take it themselves, nothing teaches better than experience.
Today I'm no longer a kid or a teen, and we live in a civilized world so I can't do anything stupid so if I'm wronged in some way depending on the severity I'll walk away and try to remove that person from my life in most cases.