In the 'the dursleys abuse harry fanfiction', the abuse can be multi - faceted. Physically, Harry could be pushed around or hit by Vernon. Emotionally, Petunia might constantly compare him unfavorably to Dudley, which is really damaging to Harry's self - esteem. And socially, they might prevent him from having any friends over, making him feel completely alone in the world.
One consequence could be that Harry becomes withdrawn. He's so used to the abuse that he doesn't trust people easily. He might have nightmares often, reliving the moments of abuse. For instance, if Vernon has hit him before, he could have flashbacks in his sleep.
Common forms include verbal abuse. The Dursleys may call Harry names like 'freak' or 'worthless orphan' constantly. Another form is making him do all the chores in the house while Dudley does nothing.
The abuse by the Dursleys in these fanfictions is a major factor in Harry's character development. It initially makes him angry and withdrawn. However, as he grows, this anger becomes a fuel for his courage. He becomes more empathetic towards others who have suffered because of his own experiences. Also, his time with the Dursleys makes him value the friendships he forms at Hogwarts even more, as they are a contrast to the loveless environment at the Dursleys'. Overall, the abuse shapes him into a complex and strong - willed character.
It could be because the authors want to emphasize Harry's difficult upbringing and show how he overcomes adversity. Also, it makes the contrast with the magical world more pronounced.
The abuse makes Harry more cautious. He has learned from the Dursleys that the world can be cruel, so he's careful about who he trusts. For example, he might be hesitant to open up to new people he meets at Hogwarts.
One possible plot could be that Harry Potter finally has the courage to report the Dursleys' abuse to the proper authorities. Wizards from the Ministry of Magic, after getting involved, find evidence of the emotional and physical abuse Harry endured over the years. The Dursleys are then arrested and Harry is placed in a more positive and caring environment within the wizarding world, perhaps with the Weasleys.
The theme of isolation is also quite common. The Dursleys isolate Harry from the outside world, and in fanfics, this often leads to him having a hard time adjusting when he finally enters the wizarding world. Also, there's the theme of revenge in some fanfics, where Harry wants to get back at the Dursleys in some way.
One common theme is Harry's resilience. Despite the abuse, he often shows great strength and determination in these fictions. For example, he might be secretly practicing magic to protect himself or finding ways to outwit the Dursleys.
It's possible. In some fanfictions, authors might explore complex motives for the Dursleys' actions. Maybe they could be under some dark magic influence that makes them act out of character and in a more extreme way. However, this goes against the general perception of the Dursleys in the original series, where they are mainly just cruel and neglectful without such extreme murderous intent.