I have been laughed at since I was a child, and now I am in my twenties, feeling empty and anxious all day.

Life is only a few decades, so why live in the eyes of others and feel uncomfortable? If there is something that others don't like, and you don't like it yourself, you can change it (except for objective conditions such as appearance), and the choice is in your own hands. It is good to be satisfied with yourself, and it is good to be suitable. Not everyone judges others by their origins or clothes. Not everyone is so superficial, right? "My mind is full of poems and books." When I meet someone who appreciates you, I cherish it and make a superficial evaluation of you. If we know he is shallow, why should we pay attention to him?

Personally, I think your problem is not the attitude of the people around you, but the fact that you care too much about being a rural person, and you can't accept yourself well. You are too sensitive to this point in your daily study and life. Everything you say and do is bound by your own mentality and you can't blend in well with the surrounding environment.

Everyone's birth is a fait accompli and cannot be changed, but everything after that depends on everyone's own diligence and ability. I know that the educational conditions in rural areas are not good. It's amazing that you can go to graduate school all the way, better than students from the city. Besides, you are not the only one from the countryside. Too many people from the countryside are still very successful. All you have to do is accept yourself, accept the new objective environment and have a good attitude to do what you want, right?