Grievance
In general, grievance (from class. lat. gravis: heavy) is a wrong or hardship suffered, real or supposed, which forms legitimate grounds of complaint. In the past, the word meant oppressive state of things.
Wikipedia
Grievance (noun)
Something which causes grief.
Grievance (noun)
A wrong or hardship suffered, which is the grounds of a complaint.
Grievance (noun)
Feelings of being wronged; outrage.
Grievance (noun)
A complaint or annoyance.
Grievance (noun)
A formal complaint, especially in the context of a unionized workplace.
Grievance (noun)
Violation of regulations or objectionable behavior.
Aggrievance (noun)
oppression; hardship; grievance.
Wiktionary