Some people might create 'Boruto' abused fanfictions out of a desire to explore dark or edgy themes that are not present in the original series. But this is a wrong approach as it goes against the positive nature of 'Boruto'.
One reason could be that it takes more time to create detailed and high-quality art for each chapter. The story might also be more complex, requiring more planning and refinement.
The reason could be that it takes time to come up with fresh and engaging storylines, plus the detailed illustrations require more effort. Monthly releases allow for a more polished product.
The Boruto anime and manga are different because the anime has to consider various factors like animation quality, viewer engagement, and commercial demands. Sometimes, this results in deviations from the original manga plot and character developments.
I really liked 'A New Beginning for Momoshiki in Naruto'. This fanfiction takes an interesting turn where Momoshiki is reincarnated in a different form and has to navigate the world of Naruto from a different perspective. It's full of action and also some great character development for Momoshiki. Also, 'Momoshiki and Naruto: Unlikely Allies' is a great read as it focuses on how their powers could combine in unexpected ways.
There are fanfictions where Momoshiki and Naruto interact in unique ways. Maybe Momoshiki has some knowledge that Naruto needs, and they have to negotiate. Their power levels are compared and contrasted. Naruto's ability to use Sage Mode and his chakra reserves are pitted against Momoshiki's alien - like powers. It creates a dynamic where both characters are forced to adapt to each other's fighting styles.
They are popular because fans love seeing the father - son relationship between Naruto and Boruto explored. Naruto is a beloved character, and seeing him show affection to his son in fanfictions is heart - warming.
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.