What is the psychology of people who like to speak ill of others behind their backs?

Some people are too jealous to tolerate others being better than themselves. He is more active than others, so he spreads rumors behind his back and speaks ill of others. The purpose is to belittle others, not as well as everyone thinks, and to satisfy their vanity and jealousy.

Second, darkness.

Some people are psychologically dark, and in order to achieve ulterior motives, they use despicable means to stab others in the back. For example, in order to get a promotion, I hacked my competitors behind my back and tried to get on the top smoothly.

Third, no brain.

There are also some people who belong to the typical big chest and no brain. This kind of person is not so bad in nature, but his mouth is too smelly and he likes to catch shadows. Especially keen on other people's privacy, like to gossip about other people's anecdotes. Showing it is making irresponsible remarks about others behind their backs.