One of my issues with him is how he sees criticism and being a douche as one in the same. Modelling is hard and he's made a valiant effort at it, but when people give him criticism, he thinks we're outright attacking him, but we're not.
The other issue, and this is strictly my opinion that I am not saying everyone has to agree with, or that I would enforce to the end of time, is that his art is dreadful. But that can be improved upon.