Nemeses

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

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.

Writer's block and self-doubt were his nemeses when it came to writing.

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