One possible reason could be that Naruto has had some really bad experiences that made him lose his confidence. For example, if he faced a series of powerful enemies alone and got severely beaten each time, it might make him scared of everyone. Another reason could be some kind of curse or dark magic that affects his mind, making him fear those around him.
In this kind of fanfiction, perhaps Naruto saw some terrifying future through a special ability. In that future, everyone around him turned into a threat to him. This vision could have been so vivid and disturbing that it made him scared of everyone in the present. Also, if there was a sudden change in his own power, like his chakra becoming unstable and uncontrollable, he might fear that others would see him as a danger and react negatively, which in turn makes him scared of them.
If you want the clearest chapter reference, go to Chapter 11. Early on, After a meeting, Shang Shaojing pinched the bridge of his nose, tired, and...; later, the chapter leans on How is it going with the Jiang Family?" The assistant looked troubled and....
A practical answer is Chapter 41, because it turns the idea into a concrete scene. The chapter opens with The live streaming room suddenly boiled over again., adds pressure through When can we finally get on the plane?, and ends on In contrast, Wen Jiaojiao didn't have such awareness..
Look to Chapter 56 for the clearest answer. It begins with Lei Shen originally had no idea about the trending topics on Weibo., keeps building through He had been busy renovating his studio for a while and hadn't even had..., and lands on At this moment, Lu Xingchao was still in the dark..
Chapter 12 is the strongest chapter-level answer because it starts from Qin?" Jiang Li called out twice, and only then did Mrs. and follows through on The glass shattered on the floor with a crash, attracting the attention of....
Chapter 12 is the strongest chapter-level answer because it starts from Qin?" Jiang Li called out twice, and only then did Mrs. and follows through on The glass shattered on the floor with a crash, attracting the attention of....
Chapter 822, "The Yu Family Gave Too Much", is the clearest early answer because it turns Gave Too Much's situation into a concrete plot event. Early on, Jiang Li entered the reception hall, which was already quite crowded..
Chapter 853, "The Bracelet Worn by the Empress?!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Li carefully examined the branches and leaves for a while.
Chapter 56 is the strongest chapter-level answer because it starts from Lei Shen originally had no idea about the trending topics on Weibo. and follows through on At this moment, Lu Xingchao was still in the dark..
The best chapter pointer here is Chapter 38, "Pretending to be a Top Student? You Must Have Forgotten Your Own College Entrance Exam Score!". It opens with Jiang Li had also observed the girl who had just entered.
Chapter 906, "Big Brother, are you jealous?", is the clearest early answer because it turns Zhao Lang's situation into a concrete plot event. It opens with A few people were somewhat surprised. and closes on After a moment of recognition, he saw it was the youngest, Jiang....