Perhaps Naruto is dejected in the Akatsuki fanfiction because of the nature of the Akatsuki's goals. The Akatsuki aims to collect the tailed beasts, which is directly opposed to Naruto's relationship with Kurama. Naruto might feel a sense of betrayal towards Kurama if he's forced to be part of something that could harm the tailed beasts. This internal conflict could be a major source of his dejection.
In the Akatsuki fanfiction, Naruto could be dejected due to the power dynamics. The Akatsuki members are often very powerful and Naruto might feel inadequate or constantly under pressure. For example, if he's trying to prove himself but keeps getting overshadowed by the more experienced and powerful Akatsuki members like Itachi or Pain. Also, he may be missing his usual support system from Konoha which could lead to his dejected state.
One possible reason could be that Naruto might feel out of place among the Akatsuki. The Akatsuki is known for their dark deeds and Naruto, with his strong sense of justice, could be morally conflicted. He may also be dejected because he realizes that some of his friends or the village he loves might view him differently now that he's associated with the Akatsuki in the fanfiction.
One possible reason could be that Naruto feels out of place within the Akatsuki. In fanfiction, Naruto might join the Akatsuki for various reasons, like being misled or having a different view of their goals. But once there, he realizes that their actions go against his own values. For example, if the Akatsuki is involved in harming innocent people, Naruto, who values life and friendship, would become dejected. He might also feel dejected if he fails to convince the other members of the Akatsuki to change their ways, as he is a character who often tries to find the good in people.
Another way is to break free from the Akatsuki and return to Konoha. Once back, he could use his experience with the Akatsuki to better protect the village. He might also work towards redeeming himself in the eyes of his friends and the village by proving that his time with the Akatsuki was a learning experience that made him stronger in his resolve to protect.
One possible reason could be ideological differences. Naruto firmly believes in protecting his village and his friends, while the Akatsuki has goals that often involve causing destruction and chaos. In fanfiction, Naruto might realize that the Akatsuki's actions go against his own values of peace and harmony, so he decides to abandon them.
One reason could be that they see a greater benefit in having Naruto as an ally, at least for the time being. Maybe they need his strength to take on a common enemy that is even more dangerous to them.
One possible plot could be Naruto joining the Akatsuki under some false pretense. Maybe he's trying to infiltrate them to gather intelligence for the Leaf Village. He'd have to keep his true identity and motives hidden while interacting with the dangerous members like Itachi and Kisame.
One possible reason could be that Naruto's ideology of peace and friendship influenced her deeply. Naruto has a way of seeing the good in people, and Konan might have started to believe in his vision more than the Akatsuki's goals of chaos and destruction.
One possibility is that Naruto joins Akatsuki to change it from within. He might think he can stop their more evil plans while also learning more about his own powers and the secrets of the ninja world that Akatsuki seems to be involved in.
Well, if Naruto joins Akatsuki in fanfiction, perhaps it's because he's disillusioned with the Hidden Leaf Village for some reason. Maybe he feels betrayed by them. In Akatsuki, he could form unexpected alliances. For example, he might bond with Hidan over their shared brashness in a way, and together they could influence the direction of Akatsuki's actions.
Maybe Naruto joins the Akatsuki with the intention of spying on them for Konoha. He could pretend to be on their side while secretly sending information back to his village. This would add a lot of tension and secrecy to the story as he has to constantly be careful not to be discovered.
In the 'Akatsuki babysits Naruto' fanfiction, Pain might see Naruto as a potential tool or threat. He could try to indoctrinate Naruto into the Akatsuki's way of thinking. Meanwhile, Konan might be the more motherly figure, making sure Naruto is fed and clothed properly. Deidara might also be there, constantly arguing with Naruto about what is 'art' and getting into comical debates.