Well, it could be that in certain fanfics, the writers want to create a more complex and angsty story. Sasuke's character is often seen as a brooding and driven one. So, they make him hate Sakura perhaps because they think it adds an interesting dynamic. For example, if Sakura is constantly trying to get close to him but he hates her, it can lead to a lot of conflict and emotional turmoil in the story.
Yan Bingyun and Shen Wan 'er were characters from the novel " Celebrating Years." Yan Bingyun was a spy sent by the Qing Kingdom to Northern Qi, and Shen Wan 'er was the eldest daughter of Northern Qi. Shen Wan 'er did not know Yan Bingyun's true identity at first, but she gradually fell in love with him. However, Yan Bingyun did not have any sincere feelings for Shen Wan 'er. He was only using her to obtain information about Northern Qi. Even so, Shen Wan 'er's feelings for Yan Bingyun were very deep. There was no clear description of their ending in the literature.
In some fanfiction, Sakura might hate Sasuke because of his actions towards her. For example, he may have continuously rejected her advances coldly. This could lead to her developing feelings of hatred as her love is not reciprocated and instead met with indifference or rudeness.
Maybe Naruto sees Sasuke as a strong and unique male character. Changing Sasuke into a female in fanfiction might go against his perception of their relationship and Sasuke's true identity. It could also be that he feels it's disrespectful to Sasuke's character development as a male ninja.
Maybe you haven't found the right type of literature yet. There are so many different genres out there, like science fiction, mystery, or even graphic novels. Try exploring different styles and you might change your mind.
Look for books that are related to your hobbies or interests. For example, if you like sports, there are many sports - themed novels. This might make reading more enjoyable for you.
Another reason might be related to their different ideologies within the ANBU. Naruto may have believed in a more collaborative and friendly approach within the organization, while Sasuke might have been more focused on individual achievement and power. This fundamental difference could lead to Naruto hating Sasuke in the fanfiction.
Perhaps the development of the characters felt forced or the overall storyline was too predictable. Maybe there was a lack of depth or complexity that you look for in a manhwa.
One way could be to write the fanfiction in a way that respects Naruto and Sasuke's relationship as it was originally. For example, if the fem Sasuke still has the same core values and relationship with Naruto. Another option is to have Naruto gradually understand and accept the different interpretations in the fanfiction through some sort of plot device in the story.