I work as a waiter in a barbecue shop. I have three waiters. They both asked for leave today, and I was the only one. I'm a little nervous. I took the wrong dish.

Explain that your boss is a good manager and considerate of employees. He knows that employees can't yell at you when they make mistakes. If your boss scolds you, you will certainly be hostile to him, and the loss will outweigh the gain. Scold you to your face, that is, disrespect you, and your self-esteem is damaged, so he chooses not to care, give you tolerance and respect, and let you do well next time.