I think page 24 of chapter 12 truly sums up the series in a way no commentator like myself really can. If I was a betting man, I'd bet those are word for word critiques and comments from editors, staff, and similar about the manga and that it was decided upon as "the beginning of the end" for the mangaka who had his series cancelled.
Its a true testament to just how transparent they were while trying to be high minded and sophisticated (and failing).
There is a desire to tell some sort of story/critique of Japanese collectivist society, of normies, and the desire for individuality within that system but ultimately saying there can be no individuality and that its all a joke and a shame of self delusion. Which I'd say that outcome of saying there can be no individuality is almost a direct result of page 24 chapter 12, of the critique the author got to tone it down, change it, whatever.
It almost feels like the author had some angst issues when told his work was subpar and instead of making it better, decided to just take it to absurdity and tried to be mindfucky. Yet the result was just their own work/creation and any underlying message they wanted to present with it being all the worse because of it.
The story itself is hampered by unlikable characters, inconsistent rules within its own world combined with an unreliable narrator, and so on. You don't need to be a rick and morty fan to understand and appriciate this, you need to be a highschool freshmen whose taken a single semester of psychology and subscribes to r/im14andthisisdeep thinking it truly is deep and profound instead of just an author self destructing after failing to create a story with no real names/faces thinking they were much more capable than they were.