What is the ruling on one who complains about the Creator to the creation? And what advice do you offer?

A servant’s complaining about his Lord to the creation is an ugly sin that indicates the ignorance of the one who does it regarding his Lord, himself, and others. Complaining to other than Allah is a despicable humiliation. So, whoever cannot endure tribulation with patience, let his complaint be to Allah alone. There are three levels: the worst is complaining about Allah to the creation; the highest is complaining about oneself to Him; and the middle is complaining about the creation to Him. The Muslim should fear Allah and have a good opinion of his Lord, and remember His exalted saying: {And it may be that you dislike a thing while it is good for you} and {But perhaps you hate a thing and Allah makes therein much good.}.