As a leader, you must lead the whole team to a higher level. This is your dedication and sense of responsibility. Your professional mission. The staff didn't do well. It is indeed necessary to educate, but we should pay attention to methods and means. They are all adults, so we should save him face. Don't point it out rudely in public. It requires skill. Because you are the leader yourself, he won't and won't dare to have too much rejection when you reprimand him. He will only react greatly if he loses face. If you talk it over with him in private, he will accept it. If you are not their leader, then you care too much. Others will not be convinced of you.