What are the opposite words for overachievement?

Overachievement is a term used to signify excessive performance or exceptional success. However, the antonyms of overachievement imply below-average performance and minimal success. These antonyms include underperformance, mediocrity, failure, and underachievement. Underperformance refers to a lower level of achievement than that expected or desired. Mediocrity suggests average or ordinary performance without exceeding expectations. Failure is the opposite of success and implies an inability to meet objectives or goals. Underachievement reflects a level of performance significantly lower than one's potential. Therefore, these antonyms highlight the importance of setting realistic goals and working towards them consistently, without overstraining oneself.