Often, there are plotlines where Harry uses his newfound knowledge from Hogwarts to outwit Vernon. He could use potions to make Vernon see things differently, or use charms to make his life at the Dursleys' more bearable. Also, some fanfictions might explore how Harry's relationship with the wizarding community as a whole helps him in his struggle against Vernon's hurtful behavior. For example, a kind wizard from the Ministry might step in to protect Harry after hearing about Vernon's actions.
In some fanfictions, Harry might cope by finding solace in his friends at Hogwarts. He could talk to Hermione and Ron about what Vernon does, and their support gives him strength. For example, they might encourage him to focus on his magic studies as an escape from the Dursley's household.
Well, in these fanfictions, a frequent theme is the contrast between the Muggle world (represented by Vernon) and the wizarding world that Harry belongs to. Vernon's ignorance and fear of magic lead him to hurt Harry. Also, the theme of isolation is common. Vernon tries to isolate Harry from the wizarding world and his true identity, which causes a great deal of emotional pain for Harry. Moreover, there can be themes of revenge where Harry eventually gets back at Vernon for all the years of mistreatment once he gains more power and confidence in his magic.
I'm not sure about specific 'vernon hurts harry' fanfiction off the top of my head. But you can try searching on fanfiction platforms like FanFiction.net or Archive of Our Own. Use the tags 'Vernon Dursley' and 'Harry Potter' and then look for stories where Vernon causes harm to Harry in the plot.
Maybe Vernon is jealous of Harry's magical abilities. He might see Harry as a threat to his 'normal' family image. Also, Vernon has always been a bully at heart and Harry, being an easy target in his house, becomes the victim of his pent - up anger.
In this kind of fanfiction, perhaps Vernon is driven by jealousy. He sees how much attention Harry gets, even if it's often negative attention within the household. This jealousy festers until he decides to take drastic action. It could also be related to some long - held family secrets or grudges that are finally brought to the surface, leading Vernon to try and kill Harry.
Some fanfictions might explore a backstory for Uncle Vernon. Perhaps he had an encounter with a wizard when he was younger that made him so bitter towards magic. In these stories, Harry could discover this secret and it could change their relationship. Also, there could be a plot where Uncle Vernon is magically turned into a wizard for a short time. This would be a comical yet thought - provoking plotline as he would have to navigate a world he once despised.
One common theme is redemption. Often, Vernon is depicted as having a chance to redeem himself for his past bad treatment of Harry. Another theme is the discovery of common ground. For example, they might find out they both have a love for a certain type of food or a shared fear. And family is also a theme. Despite their differences, they are still family in a way, and fanfictions sometimes explore how that family bond can be mended or redefined.
One possible plotline could be that Harry says something unkind to Hermione during a heated argument about a school project. This makes Hermione feel betrayed and sad. But later, Harry realizes his mistake and tries to make it up to her.
One possible plotline could be that Harry uses his magic in self - defense and this leads to a whole new set of challenges as he tries to hide it from the wizarding world while dealing with Vernon's continued abuse. Another could be that the Dursleys finally get caught by the wizarding authorities for their mistreatment of Harry, especially Vernon's torture.
One common theme is redemption. Often, Harry realizes the harm he has caused Draco and tries to make amends. Another theme is the exploration of the grey areas between good and evil. Even though Harry is seen as the 'good' one, his actions towards Draco can be quite cruel, blurring the lines. And there's also the theme of forgiveness. Draco has to decide whether to forgive Harry or hold on to his anger.