It's no use being told by others all the time. How can we keep a confidence and move on? How should I adjust my mentality?

Go your own way and let others talk. You don't care who will hurt you. Actually, you can think about it from another angle. Even if you really care about what others say and do what others say, won't others tell you what to do? A person without quality, no matter how others live, will become a slogan in his eyes, because such people are really boring. People who say you are not as good as you are actually trying to improve their self-confidence by criticizing others. If you don't care, he will lose the way to vent, and he will panic, feel bored and want to find another person to continue to vent. So why care what other people think? He can say whatever he likes. You just have to be happy. Originally, there is no standard in this world. What is good in others' eyes may become ordinary in another person's eyes. Live a little free and easy, and your confidence will come back slowly. Good luck!