Nemeses

Her lack of self-control when it came to spending was her financial nemeses.

His short temper was one of his nemeses in his personal and professional relationships.

The musician's nemeses, stage fright and technical difficulties, affected her performance.

Procrastination was one of his nemeses when it came to completing assignments on time.

The detective and his nemeses engaged in a cat-and-mouse game that lasted for years.

The nemeses of the detective were always trying to outsmart him.