This is one of the fundamental problems with the well-meaning effort to correct behavior. If you try to correct the behavior of another adult, you are going to have a bad time. Advice and corrections from others are only palatable in very specific circumstances and only coming from the right people. Is the person offering corrections in a position of authority or respect? If the answer is no, the possibility of the advice actually being taken is very low. People don’t like being condescended to like a child. It makes them resentful and much more likely to do the exact opposite of what they are told.
Another issue is that the circumstances surrounding how the advice is given can add to the bad feelings and resentment of the person who was being called out. Were they corrected in front of others? Their embarrassment could sabotage any chance of them actually taking the advice and lead to them to act out negatively as result in order to restore their own reputation in the eyes of others.
Adult bad behavior cannot be corrected with the same methods of shaming that one uses on a child. Subtlety, delicacy, and discretion are the name of the game and even then the results are not guaranteed. If the goal is truly to get someone to start treating others with more respect, the approach must be from a place of respect. For best results, be the change that you want to see others.