bane 
/ˈbeɪn/ noun
/ˈbeɪn/ noun [singular] : a cause of trouble, annoyance, or unhappiness — usually used in the phrase the bane of ▪ The ugly school uniforms were the bane of the students' lives. ▪ She was the bane of my existence. [=she made my life very unhappy, difficult, etc.]
