If it is an ordinary person, just ignore him. For a person who likes to show off her superiority, as long as you show that you don't envy her, are not interested in her superiority, and ignore her, over time, she will stop showing off her superiority, at least not in front of you. Superior. If you are the kind of person who deliberately shows off your superiority, then act more superior than her.
I have a best friend who likes to show off her sense of superiority. For a while, because something happened at home, I spent a lot of money and all I ate was vegetable porridge or just a meal. Mix it up with noodles or something. She didn't know it at the beginning. One time she and her boyfriend had a fight. When she came to see me, she happened to see us eating noodles. Although later because of her arrival, I went to buy vegetables again, but it was too big. She knew about eating noodles on the weekend and also understood our financial difficulties.
In the following days, she was showing off chicken wings, beef, fish, etc. there every day. As long as she bought it, she would show it to everyone in the group. Then I received a lot of envious expressions, but I was never envious. Maybe she thought I didn't like these very much, so she changed it to some less common ingredients. For example, there are ingredients such as scallops, lobsters, crabs, and pork kidneys, but she can’t cook them because of her cooking skills. When she posted them in the group, I saw that they were these things, so I responded: Can you cook them?
She said honestly that she didn’t know how, and people in the group also said they had never done it before and told her to ask elsewhere. So I silently posted the recipes for these ingredients in the group one by one, and they were the induction cooker version (her family only has an induction cooker), and then people in the group said that I was a great person. At this time, I just pretended to be cool, In the past, when I was not as poor as I am now, I would eat these regularly, and I would become good at it if I cooked them a lot. Slowly, she stopped showing off her superiority.