What Makes Him pathetic?
He loved to tease Sokka and look down on him just because he thinks he's a simple rube from the Southern Water Tribe. He also only wanted to marry Yue to become the chief.
What Makes Him A Pinhead?
He's terrible at pronouncing names and he tried to fight Zhao (while calling him Choi) only to get thrown overboard.
I might make a proposal for him if you think he counts.