An overwhelming number of human reactions come from a place of love or pain.
When someone offers you criticism, look at what they say (no need to internalize it immediately; instead observe it and ask yourself if the critic-giver is an important person or voice in your life, and how valuable it is); then: ask yourself if it's coming from a place of love or a place of hurt.
If it's coming from a place of love, they want the best for you and are telling you an honest opinion. It may sting, but it's good for you.
When someone comments on your work or character from a place of pain in their life, it's not actually about you. That person is hurting in some way, and lashing out. The issue is not about you. Bless them, wish them well, and realize that the commentary you need comes from a place of love.