A little jealous and snobbish trick. In short, I always want to attack others to satisfy myself. Unhealthy excessive behavior in thought, reaching a psychological state of psychological imbalance, degrading and attacking others behind their backs. I think these should be the people you mentioned!
It's a little annoying for such people, but we have to face it. Then what we should do is to ignore them to some extent. Maybe we are angry, but we should also control our reason. For better or worse, he doesn't count. You should establish prestige in front of the public, because the eyes of the masses are discerning, and it is not only a word or two that he can convince people to plant others, but also let others see his true face! Don't you think?
If you refute it, not only will you not get any good results, but you will also appear that you are not stable enough, and at the same time give those people the opportunity to attack you unreasonably! Calm and not impatient is the psychological quality you should have to really refute, and integrate into the public to establish yourself! In this case, his demeaning behavior can only let others see through the essence!