Nemeses

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

His fear of public speaking was his nemeses when it came to advancing his career.

Her fear of public speaking was one of her nemeses in her career advancement.

His stubbornness was one of his nemeses that often led to arguments with his loved ones.

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.