I'm not going to stop giving critique, unless the artist themselves tell me to. And I usually critique someone who I see will have potential in the future, so that goes to say that I do think he's good, or she's good, depending on whom you're talking about.
There is no reason for you to be so condescending, if the artist themselves don't want a critique, let them tell me.
I never said the work was bad, it just had a few different things to work on. Which is understandable. No one is perfect, and if he wants to improve it'd be best if he listened to some people's tips.
Also, if they truly are incredibly sensitive then they may want to consider posting "critique discourage" on their deviation, because as far as I can tell they were indifferent to getting a critique.
If your friend is one of those sensitive folks, I do advice him to put up "critique discourage" from now on. Otherwise he's letting himself open to critique, which people do give on this website. I, one of them.
Also, if he didn't appreciate it, let him come to me. I rather hear it from him. No offense.