Maybe in this fanfiction, Kakashi has been acting differently from how Naruto expected. Naruto is used to seeing Kakashi as a certain kind of person, but if Kakashi starts to change his behavior, like being overly strict or cold towards Naruto without proper explanation, it could lead to Naruto hating him.
One possible reason could be that in the fanfiction, Kakashi might have made a decision during a mission that Naruto strongly disagreed with. For example, Kakashi could have chosen to sacrifice something important to Naruto in order to achieve the overall mission objective.
It could also be that in the fanfiction, Kakashi has some secrets that when revealed, make Naruto feel betrayed. For instance, if Kakashi was somehow involved with an enemy in a way that Naruto finds unacceptable, it would definitely cause Naruto to hate him. This would completely shatter Naruto's trust in Kakashi.
Look to Chapter 120 for the clearest answer. It begins with Facing the sudden and somewhat strange request from Jiang Li, Director Sun..., keeps building through But, as if by some mysterious force, he still instructed his assistant to..., and lands on Drink this." Wen Jiaojiao looked at the half.
Chapter 121 is the strongest chapter-level answer because it starts from Seeing that Wen Jiaojiao's condition had improved significantly, Director... and follows through on You're supposed to be a man who conquers mountains!] Experienced and....
Chapter 69 is the strongest chapter-level answer because it starts from Since the phones issued by the program team couldn't log into Weibo, Wen... and follows through on Wen Jiaojiao immediately hugged her arms proudly, specifically waiting to....
If you want the clearest chapter reference, go to Chapter 97. Early on, Suddenly, Jiang Li's livestream room was packed with people, and the...; later, the chapter leans on [I came from Weibo's trending topics, is Master Jiang really that awesome?.
A practical answer is Chapter 114, because it turns the idea into a concrete scene. The chapter opens with As time passed, the number of viewers in the live broadcast gradually..., adds pressure through I've never seen someone so shamelessly clingy!], and ends on But just now, an uncle came and.
If you want the clearest chapter reference, go to Chapter 127. Early on, Witnessing Jiang Li leave with a bucket, Jiang Yan refused to admit...; later, the chapter leans on Otherwise, how would he ever show his face in the Capital again?"....
Chapter 127 is the strongest chapter-level answer because it starts from Witnessing Jiang Li leave with a bucket, Jiang Yan refused to admit... and follows through on He Yun, who chose the codonopsis, became the one with the most challenging....
Look to Chapter 121 for the clearest answer. It begins with Seeing that Wen Jiaojiao's condition had improved significantly, Director..., keeps building through A doctor, donned in a white coat, hurriedly got out and immediately asked..., and lands on You're supposed to be a man who conquers.
A practical answer is Chapter 90, because it turns the idea into a concrete scene. The chapter opens with Watching He Yun gradually take control of a tractor under professional..., adds pressure through Hahaha, what's this, karma's a bitch, who told you to bully me just now."..., and ends on Jiang.
If you want the clearest chapter reference, go to Chapter 125. Early on, Next, it was Qi Tianyu's turn.; later, the chapter leans on Although he didn't know what Jiang Li had chosen, just from her recent....