He's out to prove he's got nothing to prove.

A listless and alienated teenager decides to help his new friend win the class presidency in their small western high school, while he must deal with his bizarre family life back home.
Napoleon Dynamite keeps every mind human — it fights its subject at zero distance. The story fights on E8/E9 of the E0–E14 reality ladder.
Films fighting at the same level of reality, about the same things.