Maybe it's because of some misunderstandings or past conflicts. Sometimes, family members have their own biases and preconceived notions that cause them to dislike the heroine without a good reason.
It could be due to differences in social status, family background, or values. The hero's family might think the heroine isn't a good match for their son and therefore show hostility. Another possibility is that there's a family secret or rivalry involved that makes them oppose the relationship.
The hero's family might hate the heroine because they fear she'll disrupt the family's stability or reputation. Or perhaps there's a jealous sibling who doesn't want the hero to be with someone outside the family's expectations. It could also be that the heroine is mistakenly associated with a negative event or person from the family's past.
Maybe she has had some bad experiences related to so - called heroes in real life, which makes her cynical about the idealized heroes in romance novels.
Maybe he has some personal beliefs or values that conflict with the typical themes in heroine novels. For example, he might dislike the often overly romanticized or damsel - in - distress portrayals in those novels.
It could be that the hero is so focused on other goals, like achieving a great career or avenging a wrong, that he doesn't have time for the heroine. He might think that romance would be a distraction from what he really wants to do. For example, if he's on a mission to save his family's honor, he might see a relationship as something that could get in the way of his pursuit of justice.
Often, the hero being mean at first builds up to a big transformation and a deeper connection later. It could be a plot device to make their eventual love more meaningful.
Sometimes, it's a plot device to create conflict and tension. The mistreatment might lead to character growth and a more meaningful resolution in the story. Maybe the hero has misperceptions or misunderstandings that cause his behavior.
Often, it could be due to a lack of communication or understanding between the two. Maybe the hero is used to having things his way and doesn't realize how his actions affect the heroine.
Maybe the family has different values from what the novel promotes. For example, if the novel contains some ideas that are too radical or against their traditional beliefs, they would not like it.
It could be that the child doesn't like the writing style of hero novels. They might be too complex or use language that the child doesn't understand. Also, some hero novels are really long and might seem intimidating to a child. They may prefer shorter, simpler stories.
Maybe the hero has a very strong and intimidating presence. His power, either physical or in terms of status, might be overwhelming to the heroine. For example, if he is a king or a very wealthy nobleman, the heroine, who could be from a lower social class, might be afraid of the power imbalance between them.
It could be that the Shield Hero's actions or beliefs clash with the King's, leading to the hatred. Or there might be external influences manipulating the King's perception.