Nemeses

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

The roadrunner and coyote were nemeses in the cartoon.

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.

The cat and mouse were nemeses in the classic cartoon.

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