Nemeses

Superman and Lex Luthor were arch nemeses in the comic book.

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

The superhero's nemeses were constantly coming up with new plans to defeat him.

Her mother was her nemeses when it came to fashion choices.

The superhero and supervillain in the comic book were nemeses.

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

Their nemeses were their fear of failure and lack of self-confidence.