pour out one's discontent and grievances (against ...); air one's grievances
Related Translations:
诉苦: vent one's grievances; air one's grievance; pour out one's woes 短语和例子哭着诉苦 sob out one's grievances; 没有什么东西能使她满足, 她总是诉苦。 nothing contents her, she is always complaining