Harry might be initially confused. He has just found out about his lordship and now Dumbledore wants to take it away. He would likely question Dumbledore's motives.
Maybe Dumbledore believes Harry isn't ready for the responsibilities that come with the lordship. Harry is still young and has a lot to learn about the wizarding world's politics and social structures. Dumbledore may want to protect Harry from making hasty or unwise decisions in a position of power.
Harry might initially be confused. He has always looked up to Dumbledore, so when he realizes Dumbledore is trying to control him, he could start to question everything he thought he knew about their relationship. He may become more rebellious as a result, trying to break free from Dumbledore's influence and make his own decisions.
He might be motivated by a desire to protect Harry's reputation. Fanfiction can be full of wild and untrue stories, and Dumbledore doesn't want Harry to be misrepresented.
Well, he might face a lot of magical obstacles. Maybe there are spells protecting the fanfiction in some sort of enchanted library or digital realm. He'd have to use his vast magical knowledge to break through those barriers. And once he gets it, he could use it to better understand Harry's place in the wizarding world's public perception.
Yes, there might be. In the vast world of fanfiction, all sorts of creative and unexpected scenarios are explored. Some authors might come up with the idea of Dumbledore being afraid of Harry for various reasons. It could be due to Harry's newfound power that he doesn't fully understand, or perhaps a prophecy that takes an unexpected turn in the author's interpretation. Fanfic writers often like to play with the established characters' emotions and relationships in unique ways.
One of the themes could be the struggle for power or status in a magical world. Even though it's within the context of a friendship, Ron's jealousy shows how much status matters. Also, there could be a theme of growing up. Ron has to learn to deal with his jealousy, which is part of his maturation process. He can't stay a jealous child forever and has to find a way to accept the situation and move forward.
One reason could be that Dumbledore had too many other responsibilities in the wizarding world. He was the headmaster of Hogwarts and was constantly involved in dealing with the threat of Voldemort on a larger scale. He might not have been able to give Harry the individual attention and care that a true guardian should provide.
One possible reason could be that Dumbledore wants Harry to have a more normal upbringing away from the spotlight of Hogwarts and his own influence. So he deliberately steps back from the role of guardian.
One possible reason for Dumbledore lying in fanfic could be related to his own past mistakes. He may have thought that by not telling Harry everything, he could guide Harry more subtly towards the ultimate defeat of Voldemort. However, this often creates a sense of betrayal for Harry in the fanfic, which adds a new layer of drama to the story.