Maybe they're tired of seeing so many different interpretations of Natsu in fanfiction that they think are inaccurate or over - the - top.
It could be that the person feels that the fanfiction has deviated too much from the original 'Fairy Tail' storyline and the true nature of Natsu. There might be a sense that the character is being misrepresented in all these fan - created works, so they feel like Natsu has 'had enough' of this misrepresentation.
They might think that the fanfiction has flooded the 'Fairy Tail' fandom to such an extent that it's overshadowing the original work. The focus on Natsu in fanfiction has become too much, and they believe it's time to move on or refocus on the official 'Fairy Tail' content rather than all the fan - made stories about Natsu.
Maybe they think the fanfictions are starting to overshadow the original Naruto story. There are just so many different versions of fan - made stories that it's getting hard to distinguish the original from the fan - created.
They might say it because they think there are too many fanfictions that distort Hermione's character. For instance, if in a lot of fanfictions she's made into a weak character when she's actually very strong in the original series.
It could be because there's been a flood of fanfiction lately and they feel it's time to focus more on the official canon rather than all the fan - made stories. Tony Stark has a very defined character in the official Marvel world, and too much fanfiction might be diluting that.
They might feel that the flood of fanfic is diluting the true nature of the Naruto story. There are so many different interpretations in fanfics that it could be confusing or detracting from the core of what Naruto is all about. Also, if someone is more of a purist about the original Naruto series, seeing so much fan - made stuff might make them feel that enough is enough.
It could mean that in the 'Fairy Tail' universe, the character Natsu has reached a point where there is an excessive amount of fan - created fictional works about him that he, in a sense, has 'had enough' of. Maybe the quality or quantity of these fanfictions has become overwhelming for the perception of the character within the fandom.
Maybe they are a fan of Harry (from whatever fandom he belongs to) and they are tired of seeing him being abused in fan - made stories. They might prefer more positive or different storylines for the character.
She might have found that the quality of the 'Encanto' fanfiction she's been reading has declined. There could be a lot of poorly written or unoriginal stories out there, which made her decide she'd had enough.
He could leave because of a misunderstanding. Maybe he overhears something wrong and thinks the guild doesn't trust him or value him anymore. So in a fit of anger and pride, he decides to leave.
He could kidnap her because he believes she's in immediate danger. Natsu is very impulsive and might not have time to explain things properly, so he just takes her away to keep her safe.
There are several possible reasons. Maybe he's looking for more originality in his reading material. Fanfic often builds on existing universes, and Harry may be craving something completely new. Another factor could be that he's had negative experiences with certain fanfics, such as encountering offensive or poorly - written ones. After a while, these experiences could lead him to declare that he's had enough of fanfic as a whole.