Nemeses

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

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

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

The hero and his nemeses had a fierce battle that lasted for days.

Financial struggles and debt were his nemeses for many years.

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