Maybe in the fanfic, Kushina returns from the afterlife in an incomplete form. This causes her to have erratic emotions and actions, and unfortunately, Naruto becomes the target of her confusion and pain. In this case, the story could focus on Naruto's journey to help his mother find peace and fully return to her normal self.
It could be that Kushina has some sort of false memory implanted. She believes Naruto has done something terrible (even though he hasn't) and this makes her hurt him, either emotionally or physically. Naruto then has to prove his innocence and also help his mother deal with the false memories.
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 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.
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.
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.
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 fanfic could be about Kushina's early days in the Hidden Leaf. It might explore her training as a ninja, her relationships with her peers, and how she was perceived in the village. Maybe it delves into her friendship with Mikoto and how they supported each other during their pregnancies.
Maybe in this fanfic, the author wants to create a unique and dark plot. Kushina might be made to hate Naruto due to some kind of misunderstanding. For example, she could be misled to believe that Naruto has some connection to a great evil that she is against.
A possible plot in a 'death of naruto fanfic' is that Naruto is killed in a political conspiracy within the ninja world. This could lead to a war between different ninja clans as they try to figure out who is responsible. Or perhaps Naruto's death is the result of a time - traveling enemy who changes the past in a way that Naruto no longer exists, and the story could be about his friends trying to reverse this change.
Well, perhaps the plot could revolve around Naruto being lazy in his ninja training. As a result, he starts to fall behind his peers. This causes some conflict within the team, like Sasuke getting frustrated with him. Then, Naruto has to find the motivation within himself to catch up. It could also be that a new character enters the story and tries to use Naruto's laziness to their advantage in some way.