The Complainer抱怨者
professional complainer职业抱怨高手
a chronic complainer常抱怨的人
N-COUNT（可数名词） A complainer is someone who complains a lot about their problems or about things they do not like. 抱怨者[表不满]
He was a terrible complainer – always moaning about something.
他真爱发牢骚—总在不停地抱怨。