Usually, an older person must have outstanding performance in the company or stayed for a long time. I have enough experience in all aspects, and the boss usually turns a blind eye. You must keep a modest attitude towards such people. Do you think he deserves your respect in your heart? You should always ask him for advice and learn relevant work experience from him. There must be no confrontation. Frequent communication in peacetime can effectively eliminate the sense of distance and strangeness between each other.
The more people who like to show off to you, the more people who love to show off. You can completely comply with their preferences, take this opportunity to ask them questions, and they will tell you without reservation. You are proficient in business and feel easy to get started at work. Then you must thank the old man who once despised you. No matter who he is, you should show great humility and respect. Respecting them can give them enough face. He is willing to share something with you that you can't usually learn.