Another reason for the Dursleys' goodness in fanfiction could be self - preservation in a different sense. Instead of fearing Harry's magic as something that will bring danger to them, they see it as a way to protect themselves and their family. So, they start to embrace Harry and his magical abilities, leading to a better relationship between them.
In some fanfictions, the Dursleys become good because of outside influence. For instance, if a friendly wizard or witch befriends them and educates them about the wizarding world and Harry's place in it, they may change their attitude. It gives them a new perspective on Harry and his abilities, which leads to a more positive relationship.
One factor that can make the Dursleys good in fanfiction is guilt. They might feel guilty for how they've treated Harry over the years. This guilt could drive them to change their ways and be more loving and accepting towards him.
A good Dursleys fanfiction often gives them more backstory. In the original books, we don't get much about their lives before Harry came to live with them. Fanfictions can fill in those gaps. For example, exploring how Vernon got his job and how Petunia managed the household finances. Also, a good fanfiction might change their relationship with Harry in a believable way. Maybe Harry discovers a family heirloom that makes the Dursleys see him as part of the family. It's all about adding depth and new perspectives to their characters.
One way the Dursleys can be good in fanfiction is if they are forced to face the consequences of their actions early on. For instance, they might receive a warning from the wizarding world that if they don't treat Harry well, there will be serious repercussions. So they start to be nicer to him. They could provide him with a proper room, better food, and allow him to have friends over.
Often, a good Dursley in fanfiction is the result of a different backstory. Maybe Petunia has a moment of reflection about her sister Lily and decides to treat Harry better. Vernon could also come around when he sees the power and influence that Harry might have one day and wants to be on his good side. So, in these fanfictions, they become more likeable and positive characters.
In some Harry Potter fanfictions, the Dursleys are depicted as nice. This could be a really interesting take. It might show how they could have been different if they hadn't been so influenced by their dislike for magic. Maybe they could have supported Harry more, or at least been less cruel. For example, a fanfiction could explore a scenario where Vernon Dursleys actually encourages Harry's academic achievements at school, instead of always putting him down.
Well, a 'Harry Potter raised by good Dursleys' fanfiction could be really interesting. For starters, Harry would not have the sense of being an outcast in his own home. The Dursleys might encourage his magical abilities instead of suppressing them. They could introduce him to a more stable and loving family environment, which would likely change Harry's personality. He might be more confident and less brooding. Also, his relationship with Hogwarts might be different. Instead of seeing it as an escape from the Dursleys, it could be an addition to his already happy life.
In some fanfictions, the Dursleys might be portrayed as having a change of heart. For example, they could start to secretly admire Harry's magical abilities instead of resenting them. This can add an interesting twist to the original story.
I haven't actually come across a 'Dursleys kills Harry Potter' fanfiction. It's a rather disturbing concept considering how the story of Harry Potter is centered around his survival against Voldemort. The Dursleys are just part of his Muggle upbringing with their own brand of meanness. If there were such a fanfiction, it would probably change the whole trajectory of the story. For example, the wizarding world would lose its Boy Who Lived, and it would be interesting to see how the characters like Dumbledore or Hermione would react to such a tragic event.
There are likely 'Harry Potter Kills Dursleys' fanfictions. Fanfic writers often like to explore extreme scenarios. In this case, it could be a way to show how far Harry could be pushed. It might also be a commentary on the Dursleys' horrible treatment of Harry. But this goes against the somewhat forgiving nature of Harry in the original books.
The Dursleys could also cripple Harry emotionally in fanfiction. Their constant belittling, isolating him from others, and treating him like a burden could break his spirit. This emotional crippling might make it difficult for Harry to trust people, form relationships, or even fully embrace his wizarding identity. He may become withdrawn and lack the confidence needed to face the challenges in the wizarding world.
No. In the original 'Harry Potter' series, the Dursleys are presented as Muggles who dislike anything related to magic. Fanfiction is a concept more associated with fans of the series, and the Dursleys would have no interest in it.