Oi oi aren't you guys done yet by flaming him that his set sucks.
Telling him once is enough atleast give him few critiques on how to improve like few of the peoples told them.
on-topic:If you want to make a character atleast try to make something that resemble the character atm it looks something very diffrent from the Simpson Character.
Try to imagine the character and try to draw it with brush 1 and colour it later when you're done and so.