Kvetch_(Yiddish) or you could refer to them as a scrooge. (: Hope I helped. :)
A person who habitually complains or grumbles.
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WhinerSour pussDownerBuzzkillComplainerMoaner
A person who complains is often referred to as a "complainant." This term is commonly used in legal contexts, while in everyday language, such individuals might be called "whiners" or "grumblers." Complaining can reflect dissatisfaction with a situation or a desire for change.
A person who is easily annoyed or angered and frequently complains can be described as irritable or cantankerous. Such individuals may exhibit a short temper and a propensity to express dissatisfaction over minor issues. This behavior can stem from various factors, including stress, frustration, or a generally negative outlook.
It varies person to person, really.
A bemoaner is a person who bemoans - who moans or complains about something, or who is dismayed or worried about something.
A bellyacher is a person who bellyaches, who whines and complains about something, usually to their own benefit.
Kvetch_(Yiddish) or you could refer to them as a scrooge. (: Hope I helped. :)
Crybaby refers to a person who excessively complains along with crying and whining.
A grumbler is a person who constantly complains or murmurs in a discontented or irritable manner, usually about trivial matters.