Bernard is made up of equal parts Mr. Bean's social ineptitude and Wile E. Coyote's physical slapstick. He is self centered, petty and can always make a situation worse. Certainly not a childhood role model but most of the time he gets his comeuppance for his less than shining behavior. I think that's where the underlying message is, what goes around comes around.
Moral soap boxing aside, I have not laughed out loud at a cartoon like this since the classic WB's. Also another aspect about Bernard I like is the subtle actions and facial expressions for the characters. It shows the strength of the animators when they can convey so much emotion with no dialog. And finally there is something that appeals to
my inner child me about an animated character being physically injured so often. Bernard could certainly give Homer Simpson a run for his money.
You can see more Bernard on Veoh.