disgruntled employee

Translations
недовольный сотрудник
The disgruntled employee decided to file a complaint against the company.
Недовольный сотрудник решил подать жалобу на компанию.
Definitions
A disgruntled employee is a worker who is dissatisfied or unhappy with their job, often due to perceived unfair treatment, poor working conditions, or lack of recognition, which may lead to decreased motivation and productivity.
Words
disgruntled

adjective
недовольный
employee

noun
сотрудник