There are a few motives. One is that fans who love the Naruto x Hinata dynamic may feel that Sakura's character was overrated in the original. They believe that by bashing her in fanfiction, they can give more focus to Naruto and Hinata. Another reason could be that some fans have their own ideas about how the story should have gone in terms of relationships. They might see Hinata as a more suitable partner for Naruto and use the fanfiction to rewrite the narrative, putting Sakura in a less favorable light to make their preferred pairing stand out more.
Some fans might write it because they're big fans of the Naruto - Hinata pairing. They feel that in the original story, Sakura got in the way of their relationship development, so they write fanfics to change that. They want to see more of Naruto and Hinata's love story without Sakura's interference.
Well, there could be several reasons. For one, some fans might not have liked Sakura's character in the original Naruto series. Maybe they thought she was too whiny or that her actions towards Naruto were unfair. So, they write these fanfictions to create a world where Hinata gets more attention from Naruto and Sakura is sort of pushed aside. Also, fans might just be more interested in exploring the Naruto - Hinata relationship further and bashing Sakura is a way to do that, highlighting Hinata's positive qualities in comparison.
A practical answer is Chapter 142, because it turns the idea into a concrete scene. The chapter opens with The ingredients for making Buddha Jumps Over the Wall were still on their..., adds pressure through The unique taste and aroma almost blew his eyebrows away., and ends on Wen Jiaojiao.
The best chapter pointer here is Chapter 154, "He Came, Bringing with Him the Bastard Game". It opens with Hahaha, I'm dying of laughter, Lili, do you really have to be so blunt?"... and closes on Helplessly, Director Sun could only grit his teeth and add another 5....
A practical answer is Chapter 171, because it turns the idea into a concrete scene. The chapter opens with The afternoon rain stopped and started again, making the air even more..., adds pressure through Could this top star really be a flower that withers at the first sight of..., and ends on They.
The best chapter pointer here is Chapter 138, "From now on, let's get to know each other again". It opens with Is there such a good deal? and closes on Could it be that the poison also had a side effect of making a person more....
A practical answer is Chapter 150, because it turns the idea into a concrete scene. The chapter opens with Upon hearing the first part of Jiang Li's words, Zhang Cheng dismissed..., adds pressure through Yes, the problem lies with He Yun., and ends on He spent the last few days visiting various.
Look to Chapter 147 for the clearest answer. It begins with Xiao Xueyi nodded in agreement after listening., keeps building through Su Yinwan seemed to have matured overnight, becoming more and more adept..., and lands on Only Jiang Li glanced back at Director Sun, and then took out her own....
Chapter 160 is the strongest chapter-level answer because it starts from As the sky gradually darkened, the originally mild drizzle began to... and follows through on Then came Shu Yan and Jiang Li, while He Yun silently moved to the back of....
A practical answer is Chapter 178, because it turns the idea into a concrete scene. The chapter opens with Wen Jiaojiao is just too unreasonable, why does she have to single out..., adds pressure through The gifts were guaranteed to please everyone, and with this, the beloved..., and ends on Let's.
Look to Chapter 142 for the clearest answer. It begins with The ingredients for making Buddha Jumps Over the Wall were still on their..., keeps building through There were so many people in the village, just making a small portion was..., and lands on Wen Jiaojiao immediately lit up and stepped.
Look to Chapter 137 for the clearest answer. It begins with Jiang Li personally went to Lai Fu's tomb and performed a small ritual., keeps building through After it was finished, she took out talisman paper and gently waved it..., and lands on At that moment, Qi Tianyu had just finished his.