I always thought that the best man or bridesmaid existed for the bride and groom. The best man should help the groom entertain guests when no one is called, and block the wine for the groom when someone is toasting. The bridesmaid went to relieve the bride's nervousness and also helped her when she was tired. If the bride wants to drink water, pour her a cup, and if the bride wants to go to the bathroom, help her put on her wedding dress. This is my understanding as the best man and maid of honor.
However, so many people don't think so. They think they are the best candidates for the groom, and they are giving him face. They will create all kinds of troubles and lose face at the groom's wedding. They think that everyone at the wedding should not be respected, especially the bridesmaid. I even saw a wonderful flower discussing how to use other bridesmaids when discussing being the best man. I can only say that the groom knows such a person and calls him the best man. I don't know how many lifetimes have passed.
Therefore, I think that the emergence of marriage disputes is that some people have not let go of their mentality at the wedding and learned to respect others. These people said that they didn't have a tutor, and Xiong Haizi grew up to be Xiong Haizi. To put an end to this phenomenon, we can only look at the groom. As long as the groom knows his friends and doesn't ask those unreliable friends to be the best man, nothing will happen.