Well that's really below the belt. As recipients of critiques, we must be able to discern as well when a comment is still within the boundaries of the topic or if it's meant to bash us already. Some people just have the habit of rubbing off other's shortcomings just to make themselves feel momentarily superior. Spot them and stay away from them. They won't help build your skill and self-esteem.
I like to receive critiques. That doesn't mean we should accept all. Some may have some points and some may not . But is much better than always hear "it is Nice" - Even if some one thinks it is a "nice" job I love to hear why you think that way. Expressing the reasons helps to improve it.