How do you handle criticism?

Criticize— to consider the merits and demerits of and judge; to find fault with.

First off, you have to separate criticism from hate.

If it's good, constructive criticism, simply acknowledge the person for pointing it out and thank them.

Just remember this: The goal of criticism is almost never to actually help. When criticism does not offer a solution, it is always with the goal to reduce you and your efforts!