Maybe the fanfic often misrepresents the nature or relationship of Bellatrix and Rodolphus. For example, if in the original they are portrayed as very dark and loyal to a certain cause, but fanfic makes them out to be something else entirely, like soft or good - hearted, it could lead to dislike. Also, some people who are die - hard fans of the official story just don't like the idea of others taking creative liberties with their beloved characters.
It could be that the quality of the fanfic related to Bellatrix and Rodolphus is generally low. Bad writing, out - of - character behavior in the stories, or simply uninteresting plots can make fans of the original characters hate the fanfic. Since Bellatrix and Rodolphus are complex characters from a particular universe, getting them wrong in fanfic can be a big turn - off for their fans.
Perhaps there could be some sort of 'quality control' in the fanfic community for stories related to Bellatrix and Rodolphus. This could be in the form of peer - review or a set of guidelines for writing about these characters. By having a standard, the overall quality of the fanfic could improve, and potentially reduce the hate from fans of the original characters.
One key element is the exploration of their loyalty to Voldemort. Their actions as Death Eaters are often central. For example, in many fanfics, they are shown carrying out his orders together.
The theme of transformation is possible. Bellatrix and Rodolphus are known for their dark and often cruel ways. The pregnancy could be a catalyst for them to transform into more caring and protective individuals. Additionally, the theme of secrecy might play a role. They might need to keep the pregnancy a secret from some of their enemies or even some of their fellow Death Eaters who could see it as a weakness.
One reason could be revenge. Bellatrix might want to get back at Harry for causing problems for Voldemort and the Death Eaters. Kissing him could be a form of humiliation. Another reason could be a power play. By kissing Harry, she shows that she can get close to him and has some sort of control over the situation.
One reason could be that the fanfic distorts the characters he knows well from Gryffindor. For instance, if it changes the personalities of his friends in Gryffindor in a way that doesn't seem right to him.
Perhaps he thinks fanfic undermines the integrity of the original Naruto story. The official story has a certain narrative and character development, and fanfic can deviate from that significantly. When it comes to his connection with Naruto, any deviation in fanfic might be seen as a negative. For example, if a fanfic changes the way he mentors Naruto, it could be something he wouldn't like.
Hermione's leadership skills might also play a part. If she takes charge in a group or a mission, and is able to guide others effectively towards a common goal. Rodolphus, seeing her lead with confidence and intelligence, would surely be impressed.
One common theme is their loyalty to Lord Voldemort. Fanfics often explore how their allegiance to the Dark Lord affects their relationship with each other. For example, they might have to make sacrifices in their marriage for the sake of serving Voldemort.
The writing quality in some Pokemon fanfic could be really poor. There might be bad grammar, inconsistent plotlines, or just a general lack of creativity that makes you dislike it. For example, some fanfics just reuse the same old ideas over and over again without adding anything new or interesting to the Pokemon universe.
It could also be that the fanfic might interfere with the way he wants his story to be remembered. His adventures at Hogwarts were real and important to him, and when fanfic changes the narrative, it's like his story is being disrespected. For example, if a fanfic portrays him as cowardly when he was actually brave, that would surely make him dislike it.