Nemeses

His phobia of heights was one of his nemeses that prevented him from enjoying outdoor activities.

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 thief's greed eventually became his nemeses and led to his capture.

Her nemeses were her anxiety and perfectionism.

The two rival gangs were nemeses in the crime world.