Bismillah:

"When you have felt the pain of being mistreated , you have two choices:
1) "revenge" by mistreating others
2) make sure that no one feels the same pain you felt before.

If you choose 1, you are no different from the one who mistreats you and this will become a cycle in the society which leads to many negative things.

If you choose 2, you don't just make a favor for your own good, but you are also performing Ihsaan , a high quality of manner, to others. We need more people like you in the society.