"You know this isn't good enough. WHy do you bother picking up the pencil? There are hundreds more better then you right now who can make a masterpiece with three lines. Take a hint and go home. You applied 4 times there and they keep saying you're not talented enough. Just quit!"

....or

"This sucks. I'm not even a blip on someone's radar. No one would pay for this, it's garbage. Wait you want that one? Why not this one that took me twice as long? Who are you to judge? Let me see what you can make! Have you even attempted to put something out into the world or do you just like to dump on everyone?!"

explanation here: http://www.furaffinity.net/journal/5353527/