Nemeses

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

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

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

The homeowner's nemeses, termites, caused extensive damage to the structure of their house.

The traveler's nemeses, lost luggage and delayed flights, ruined her vacation.