We all know the best levels are made in under 5 minutes,
Try not to cry in anger is the true challenge here.
I dunno, something inspirational is supposed to go here so here I go:
Realize the difference between criticism and hate.
Criticism is direct feedback about the level that helps and tells you what you could do better and/or what you could expand upon.
Hate is direct insults towards you/your level that tell you nothing other than how bad you are.
AKA: Don't cry at every responce you get, just ignore hate and respond to criticism.