There are also fanfictions where Naruto is mistreated by the ninja system. The system might be depicted as suppressing Naruto's growth and abilities, not allowing him to rise in the ranks despite his obvious talent and hard work, just because of his status as a jinchuriki.
Perhaps mokoba is made to suffer unjustly in some fan fictions. For instance, it might be given a backstory full of pain and hardship that doesn't align with its original traits, just to create some sort of 'drama' in the fan fiction. This can be a form of mistreatment as it goes against the true nature of mokoba.
On the other hand, it might distort the original essence of the character. Naruto in the original work is a positive and resilient character. But too much mistreatment in fanfiction can make him seem overly pitiful and change the way fans view his strength and growth. For example, if he is always being beaten down without any chance of fighting back in fanfiction, it gives a different image compared to the Naruto who is constantly striving to improve and prove himself in the original series.
A typical mistreated animal story involves the illegal wildlife trade. Many animals like tigers are poached for their body parts. Their cubs are often taken away from them, and they are killed brutally. In some zoos, animals are not provided with adequate living spaces. They may be locked in small enclosures that don't resemble their natural habitats at all. This can cause them a great deal of stress and is a form of mistreatment.
A plotline might involve Naruto's family physically harming him in the fanfic. This could be out of anger or because they see him as a burden. They might also isolate him from the rest of the family, not allowing him to participate in family gatherings or traditions. This would make Naruto feel even more alone and unwanted. And perhaps they spread false rumors about him in the village, which further ostracizes him from the community.
Fanfiction can vary greatly, but in general, 'naruto sadistic fanfiction' might involve dark and often cruel interpretations of the Naruto universe. However, this type of fanfiction can be disturbing and not in line with the original positive themes of the Naruto series. I don't really recommend seeking out such extreme examples as they can be harmful to the perception of the original work.
In some 'naruto is peaceful' fanfictions, Naruto travels the world spreading the message of peace. He could be teaching the younger generation in different villages about the importance of co - existence and non - violence, and how the cycle of revenge only brings more destruction.
One example could be a fanfiction where Naruto is physically abused by villagers in the Hidden Leaf. They might throw stones at him or verbally harass him more than in the original story.
There may be fanfiction where Naruto is brainwashed by an ancient evil spirit. The spirit manipulates his mind, leading him to abandon his ninja way and start following a path of destruction. His friends then have to find a way to break the brainwashing and bring him back to his true self.
One example could be a fanfiction where Naruto is betrayed by his closest friends in the Hidden Leaf Village and turns to the dark side out of anger and despair. He might start using forbidden jutsus in a more malevolent way than in the original story.
Some 'naruto harm fanfiction' might involve Naruto facing extreme hardships like being betrayed by his closest friends in the story. For example, a fanfic could show Naruto being framed for a crime he didn't commit by Sasuke, which leads to him being ostracized by the village.