malcontent

A malcontent is someone who's always unhappy and complaining about things. They might feel that their life or circumstances are unfair.

You often hear people use this word when talking about politicians, business leaders, or celebrities who seem to always have a negative attitude. For example, if a politician is constantly criticizing the government without offering any solutions, you might call them a malcontent. This doesn't mean they're bad people, but rather that their constant complaining is annoying or unproductive. Some people use this word in a more playful way, saying someone's being a malcontent just because they're grumpy about something that happened to them recently. But generally, it implies that the person has an excessive sense of dissatisfaction and often expresses themselves in a negative way.