First, take Jia Baoyu as an example. It is precisely because of the connivance and doting of his mother, Mrs. Wang, that he has a lawless temper It is precisely because of his playboy character that his wife's failure to teach and Mrs. Wang's own problems are reflected. Various problems in this family are also reflected in the dude, such as being too fond of children, not teaching them well, and the vanity of elders is too heavy, which is also one of the reasons for the decline of the family. Without a good foundation of elders, the foundation of this family will not be solid.
In addition, the dude himself will be extravagant, not paying attention to good qualities such as economy, which will make them have nothing to hide, as if the money at home is inexhaustible, and no matter what kind of family, it can't afford such a failure. Anyway, it is the dude in a dream of red mansions, a foreshadowing of the decline of the family, which indicates the fate of several big families.
In a word, A Dream of Red Mansions reflects a kind of reality, and dude is one of the carriers and means. With the help of the image of Dude, the author conveys some information to the readers, which potentially implies what the ending will be. I think the author is thoughtful and has a good writing skill, so I respect and admire him very much.