Every bit of crit merits looking at. Some of it'll be shit, yeah, because some people are stupid--but try to see where the crit-giver is coming from.

Along those lines: if the reader doesn't like your work, that doesn't mean they're jealous. If they have solid, spelled-out reasons for not liking your work, and there's more than a few of them, then you may really need to sit down and rethink what you're doing.