I do not like but it is his attitude, especially when it comes to constructive criticism
So you make a comment about his beard, he doesn't agree and then you complain he doesn't take "constructive criticism"? Such a poor generalization. He probably also has a mirror you know... and a wife... So probably he knows what he looks like.
I actually went back to see his comments here, the end is a fight but farther back it looks positive to me and he gets positive replies. But maybe there already was a negative sentiment it's hard to see.