Why is a family of three dragons not good?

In ancient times, the king of a country was called the real dragon emperor, so there was a saying that (the dragon suffered), which meant that a country could not tolerate two masters. Now that the country has a king, wouldn't it be a struggle to have another one? There are many dragons in a family who want to be in charge and no one will obey. Will this family have a good life? In fact, this is superstition and not credible.