Nemeses

The detective knew that the elusive criminal was his nemeses, always managing to evade capture.

The city's nemeses, potholes, made for a bumpy and frustrating commute.

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

Poor time management was one of his nemeses that hindered his productivity.

His impulsive behavior became his nemeses in the courtroom.

Writer's block and self-doubt were his nemeses when it came to writing.

The nemeses of the criminal underworld are the police officers who tirelessly work to bring them to justice.