Well, it could be that the plotlines in the Sam fanfiction are just not to Bella's taste. She might prefer different types of stories, and the ones about Sam are often full of elements she doesn't like, such as certain relationships or events that are depicted in the fanfiction.
It could be that the fanfiction writer took a different approach to the story. In some fanfictions, the Cullens could be involved in situations that go against what Bella stands for. Perhaps they are written to be more secretive and untrustworthy, leading to Bella's hatred.
Sam and Bella might love fanfiction because it offers a chance to explore different worlds and stories that are not always available in mainstream literature. Fanfiction can take beloved characters from existing works and put them in new and exciting situations.
Possessiveness is often a theme because it adds drama. In Sam and Bella's relationship, it can show the intensity of their connection. Sam might be possessive because he truly cares for Bella deeply. It makes for an interesting dynamic as it can lead to conflicts, like when Bella wants more freedom but Sam's possessiveness holds her back.
One possible reason could be that Sam has a different vision or interpretation of the characters. He might not like how the fanfiction portrays Bella or himself. Maybe the plot in the fanfiction goes against his values or the established lore of the original story.
Maybe Naruto is a character with a focus on his own ninja journey and goals. Love fanfiction might deviate from his core identity in the original story, so he 'hates' it.
In some fanfictions, the world - building or the plot might force a rift between them. If the story is set in a situation where resources are scarce and they have different ways of handling it. Hermione's more logical and rule - based approach might clash with Annabeth's more instinct - based approach, leading to Hermione hating her.
It could be that the essence of Naruto's character is often misrepresented in Superman fanfiction. Naruto is about hard work, friendship, and achieving one's dreams through personal growth in his own story. When put into Superman fanfiction, his character might be forced to fit into plots that don't align with his original values, which could lead to the idea that he 'hates' such fanfiction.
Perhaps Naruto fans who are into the Naruto story for its action, ninja skills, and complex relationships within the Naruto world find Aphrodite fanfiction to be a distraction. Naruto is a character with a very specific identity and purpose in his own story, and introducing Aphrodite from a different mythology into his fanfiction might seem like a forced and inappropriate mash - up.
One reason could be the pressure on Boruto. In fanfiction, if Boruto fails to meet the high expectations set by Naruto's legacy, Naruto might show disappointment which could be misinterpreted as hatred. Also, there could be external forces in the fanfic world, like an enemy influencing their relationship, making Naruto seem like he hates Boruto.
It could be that the OC creator simply doesn't like the typical tropes or storylines often found in Rias fanfiction. For example, if the fanfictions tend to be very formulaic or over - use certain clichés, the OC might be a symbol of a break from that. Also, perhaps the OC has a specific backstory or purpose that is at odds with the general narrative of Rias fanfiction.