In "Funny Girl," the protagonist's disappointment stems from an internal struggle with self-identity and the realization that he hasn't met his own expectations. Despite his efforts and calculations, he feels like he has fallen short of what he believed he could achieve. This discontent creates a tension in his life and relationships, as he grapples with the difference between his aspirations and reality.

The character's dilemma highlights an often unspoken truth: sometimes, the greatest obstacles we face come from our own skewed perceptions and unrealistic expectations. The narrator recognizes that the character's frustration is not unfounded, but it's complicated, and she feels hesitant to confront him about the inaccuracies in his self-assessment. This dynamic adds depth to the story, exploring themes of ambition, disappointment, and the complexities of human relationships.