In "Boss Calls Cleaner 'Good for Nothing,' Lives to Regret It," a boss belittles a hardworking cleaner, underestimating her contributions. Hurt but determined, she proves her worth through her dedication and skills, eventually gaining the respect of her colleagues and the boss. As her value becomes clear, the boss realizes his mistake and learns a valuable lesson about treating everyone with respect, regardless of their role. The story emphasizes themes of humility, recognition, and the consequences of disrespect.