Artist's Curse
Believing your own work to be sub-par, even if it isn't, simply because you've been working with it for so long that you notice imperfections that no one else will.
Observer: Your art looks great!
Artist: What?! No, it looks horrible! What are you talking about?
Observer: I think you have the Artist's Curse.
Artist: What?! No, it looks horrible! What are you talking about?
Observer: I think you have the Artist's Curse.