Well, it would change the power dynamic. Usually, Dumbledore is seen as a guiding figure for Harry. If Harry stops listening, he might make more mistakes as he lacks Dumbledore's wisdom. For example, in battles, he might not make the strategic decisions that Dumbledore would have advised.
Perhaps Harry has grown tired of always following Dumbledore's instructions without fully understanding the reasons behind them. He might want to make his own decisions and take control of his own destiny, rather than relying on Dumbledore all the time.
The concept of 'Harry Potter stops Dumbledore' might also be related to character development. Harry has always respected Dumbledore, but as he matures, he may start to question Dumbledore's actions. By stopping Dumbledore, he is asserting his own beliefs and values. It could be in a situation where Dumbledore's actions were endangering the school or their friends. Harry, having a different perspective from his own experiences, decides to intervene to protect what he holds dear.
One way is through dialogue. Harry could passionately explain his reasons to Dumbledore, showing his growth and understanding. For instance, 'Dumbledore, I can't let you do this. We have another way.'
One common theme is the exploration of power dynamics. Harry, as a young wizard, is challenging the authority of Dumbledore, who is seen as one of the most powerful and wise wizards. It makes readers think about who should hold power and how it should be used.
There's also a fanfic titled 'Harry's Stand Against Dumbledore'. In this one, Harry discovers a hidden side of Dumbledore's plans that he believes will harm his friends. So, he takes a stand. The story is full of emotional turmoil as Harry battles with his loyalty to Dumbledore and his need to protect his loved ones.
Well, perhaps one of the other teachers might have noticed Snape's behavior towards Harry and reported it to Dumbledore. It could also be that Dumbledore, being as perceptive as he is, noticed Snape's extra harsh treatment of Harry during their interactions in the corridors or in class.
In the 'Harry Potter' fandom, this would be a very controversial concept. Dumbledore is often seen as a mentor and a powerful, positive figure. Having Harry Potter destroy him goes against the general perception of their relationship in the original series. However, in the realm of fanfic, some might explore such a dark and alternative take as a way to examine different character arcs and what - if scenarios, but it would likely be met with a lot of resistance from purist fans.
It could be that Harry finds out about Dumbledore's secrets regarding the Deathly Hallows. If Harry thinks Dumbledore was more interested in the Hallows for his own purposes rather than for the greater good, it might make him hate Dumbledore.