Well, he might be found by someone unexpected. Maybe a group of young witches and wizards who are on an adventure outside of Hogwarts. They could take Harry under their wing and introduce him to the wizarding world in a completely different way. Instead of the strict rules and regulations that he later faces at Hogwarts, he could learn magic in a more free - spirited and experimental environment. This could shape his character to be more rebellious and independent, not afraid to break the rules when he believes they are unjust.
The Dursleys' abandonment could also lead to Harry being found by a dark wizard or a group of dark wizards. They might see his potential and try to turn him to the dark side. However, Harry's good nature would probably resist this. But it would be a great struggle for him. He would have to learn how to defend himself against dark magic at a very young age. This could make his journey to become a hero even more difficult and filled with more challenges as he has to constantly fight off the temptations and threats from the dark side.
Dumbledore could rescue Harry. He's always been watching over Harry and would surely sense if the Dursleys had abandoned him. Dumbledore has the power and wisdom to take Harry to a safe place, perhaps a different magical family or a special hideout. He could also start teaching Harry about his past and his parents earlier, which would give Harry a better understanding of his place in the wizarding world.
Harry might rely on his own wits and magic. Since he has some natural magical abilities, he could use them to fend for himself, like conjuring food or finding shelter.
Well, in some versions of the 'Dursleys abandon Harry fanfiction', they abandon him due to social pressure. They are worried about what their neighbors or friends might think if they find out about Harry's true identity. Also, Petunia may have some deep - seated jealousy towards her sister Lily for being a witch, and this negative feeling extends to Harry, leading them to abandon him.
His relationships could be affected. Hermione and Ron might have to take on more of a caretaker role, which could change the dynamic of their friendship. Also, he may face discrimination or pity from other students at Hogwarts, which could further isolate him. And in terms of romantic relationships, his self - esteem due to his crippled state might make him less likely to pursue someone like Ginny.
One consequence could be that Harry becomes withdrawn.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.
Perhaps he gets a chance to attend a special magical school or training program that requires him to leave the Dursleys. It could be a place where he can develop his powers without the Dursleys' interference. Also, he may be running away from a threat that the Dursleys are unable or unwilling to protect him from.
He might become more independent. Without the Dursleys, Harry would have to fend for himself. He could start to discover his true powers faster as he no longer has to hide his magic in the Dursley household. For example, he could practice magic freely and develop his skills more quickly.
Perhaps Harry uses his influence among his friends. Hermione could help him find some loophole in the Muggle - wizarding laws regarding property. Ron might provide some comical support, like trying to use some half - baked spell to make the Dursleys uncomfortable enough to leave. In the end, Harry evicts them and takes over the house, turning it into a place that's more welcoming for himself and his wizarding friends when they visit the Muggle world.
Perhaps Harry sues the Dursleys for false imprisonment. He realizes that all those years of being confined to his room or the cupboard were illegal. He enlists the help of Hermione, who is well - read in both wizarding and Muggle laws. They present a strong case against the Dursleys. As a result, the Dursleys face public humiliation in their neighborhood, and Harry finally gets the justice he deserves, while also starting to heal from the trauma of his childhood.
One possible plot could be that the Dursleys, out of their long - held hatred and envy, finally find a way to use dark magic against Harry. Maybe they make a deal with some dark wizards who provide them with a powerful curse. They manage to cast it on Harry when he's at his weakest moment, perhaps during one of his vacations at Privet Drive.