Nemeses

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

His short temper was one of his nemeses in his personal and professional relationships.

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.

Time management and work overload were his nemeses at the workplace.

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