Perhaps Kushina, in an attempt to keep Naruto safe from the threats she anticipates, ends up isolating him from certain experiences or training opportunities. This isolation could 'cripple' his development as a ninja compared to his peers. He might miss out on important teamwork building or advanced combat training, which in turn holds him back in his overall growth as a ninja.
It's possible that some of the older ninja in the village, like the Third Hokage, could also be characters in this fanfic. Their reactions to Kushina's actions towards Naruto or their attempts to counteract the 'crippling' effect could be part of the story. Their wisdom and authority might play a role in either helping or hindering Naruto's situation.
One possible plot could be that Kushina is under some sort of mind - control. For example, an enemy might use a powerful genjutsu on her, making her lash out at Naruto unknowingly. This would create a lot of internal conflict for Naruto as he tries to understand why his mother is acting this way and how to break the control over her.
Perhaps in the 'naruto bangs kushina fanfic', there is a plot where Naruto discovers a hidden power within Kushina that was never explored in the main series. This power could be crucial in saving the village from a new and powerful threat. He then has to work with Kushina to harness this power and protect their home.
Perhaps in this fanfiction, Naruto turns to the darker side of the ninja world. Since he lacks the love and guidance from Minato and Kushina, he might be more easily influenced by Orochimaru or other villains. He could start to believe that power is the only way to get respect and recognition, and thus embark on a path that is different from his canon self. He might also form unexpected alliances with characters who are also outcasts in the shinobi society.
Well, without actually reading the 'kurenai cripples naruto fanfic', it's hard to say for sure. It could be that the author has created a scenario where Kurenai's actions or decisions lead to Naruto being in a difficult situation. Maybe she uses some kind of jutsu or makes a choice that has a negative effect on Naruto's journey. It could also be a more emotional or psychological 'crippling' rather than a physical one.
Well, perhaps in the 'naruto abused by kushina fanfic', it could start with Kushina having a premonition of Naruto causing great harm in the future. So, in her attempt to prevent that, she goes overboard and starts abusing him. Or it could be due to some long - hidden family secret that makes her act out against Naruto, thinking she's doing the right thing for the family or the village in the long run.
One possible plotline could be that Kushina is somehow mind - controlled or influenced by an evil force to harm Naruto. Maybe she's under a powerful genjutsu that makes her see Naruto as a threat to the village instead of her son.
In some fanfics, there could be a misunderstanding. Suppose Kushina did something that Naruto misinterpreted as harmful to him or his friends. This misinterpretation could lead to his hatred. For example, if Kushina was involved in a mission that Naruto thought put the village at risk, but in reality, she had no choice.
A plotline might involve Naruto traveling back in time and meeting Kushina when she was young. They could start as friends and gradually fall in love. Or perhaps there's a prophecy that links them together, and they have to fulfill it, which leads to their mating. There could also be a situation where a powerful enemy forces them to work closely together, and that closeness turns into a deeper relationship.
One possible plotline could be Kushina's daily life taking care of baby Naruto. She might be shown singing lullabies to him, or just watching him sleep with a loving look. Another could be about Naruto showing early signs of his ninja abilities as a baby, like accidentally using chakra in a cute way while Kushina tries to figure out what just happened.