Low self-esteem
A guy had been feeling down for so long that he finally decided to seek the aid of a psychiatrist.

He went there, lay on the couch, spilled his guts then waited for the profound wisdom of the psychiatrist to make him feel better.

The psychiatrist asked me a few questions, took some notes then sat thinking in silence for a few minutes with a puzzled look on his face.

Suddenly, he looked up with an expression of delight and said, "Um, I think your problem is low self-esteem. It is very common among losers".