Jussef is a whiz at spelling. He has won multiple local and regional spelling bees. When he moves to a new state, he makes friends with Marcus, and finds out later that he is a champion speller who has won national competitions. Jussef is likely to feel

Dissonance

Explanation:

In cognitive dissonance, once feels inferior that id there is this imbalance feeling that one has in which they do, say or think things that usually do not fit with our already made traditions, beliefs, opinions or values, and mostly we are uncomfortable as a result of it.

It is simply known to be Inconsistency between beliefs and its action lead to mental stress of that individual.