Ego Problem
An Ego Problem is when a person acts like a massive dick (regardless of gender) because they think that they're better than their peers around them, when in reality they're another fucking loser that believes they have more friends, money, fame/clout etc.
Man, Michael has a huge Ego Problem. I can't believe Michael still thinks that we're his friends because we acted nice to him; or that his Good Will jacket makes him look rich.