I'm glad you learned a lesson here. We won't be removing your post so it can maybe serve an educational purpose to others in the future, too. Thank you for being willing to accept criticism.

The problem with the term delusion is that implies "mental illness" as a dichotomic alternative to "just having fun".

I disagree. Spoilers for everything::

Don't be a DEckhead. The stories aren't real, the characters aren't real. They're subject to reimagining and reinterpretation.

I like the term "Death of the Author"

the latter most likely

Warning: minor non-specific spoilers about the direction of the characters and narrative of Naruto:

It doesn't get better. I mean maybe in the anime, idk, I've only read the manga. But in the manga while she does do some incredible things, it never really feels earned or believable. She has a couple of moments in the final arc where she pretty much looks at the camera and says "I'm finally on equal footing with the other main characters, I'm gonna show them how great I am!" And then she dunks on some faceless fodder enemies for a moment, then we cut back to Naruto and Sasuke basically transforming into Godzilla and going toe to toe with God. Like, she is in like the top 10 strongest people in the setting's history by the end of the story, but we never get any believable explanation for how she accomplished that or any satisfying achievement she uses that strength for. She's like a narrative leech, by existing in proximity to Naruto and Sasuke she absorbed some of their plot armor.

The only female character in Naruto who is ever written even kind of well is Tsunade.

I think one of the weakest things Kishimoto ever does is write side characters with a double whammy of being a woman as well. He does some stuff extremely well - for example, themes you've seen in 150 episodes absolutely inform the shape and content of the climax of the narrative writ large. Writing Sakura is not one of his strengths I would argue.