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.

Impulsive buying was one of her nemeses that resulted in a financial crisis.

The superhero and supervillain in the comic book were nemeses.

The nemeses of clean energy are the fossil fuel industries that have long dominated the world's energy production.