If the purpose of writing is communication, the author did a piss-poor job of delivering that communication, because no one knows exactly what happened at the end of this "story." It doesn't matter how many people purchase a bucket of shit for $9.99, it's still a bucket of shit.
But it is probably good shit, if you are growing roses it might be just what you want. If you put it in your sandwich, then complain about it being shit, then that says more about you.
Blatantly refusing to understand the point and making a ridiculous comparison is a sign that you don't even believe your own argument. This isn't a question of whether people liked the ending or agreed that it should end that way. There was no ending to like or dislike in the first place. There was no resolution or explanation for anything that happened after the second time skip. Imagine if "The Usual Suspects" had ended with Verbal walking out of the police station limping and then faded to black to roll the credits. Imagine if "The Sixth Sense" had ended without Dr. Crowe seeing his wedding ring fall out of his wife's hand.
This non-ending was lazy and it was confusing, and I believe it was because the author couldn't make up their damn mind about who of the most vocal readers to disappoint - the "free Uta" crowd or the "Uta x Kaoru" crowd. So they decided, "why not both?" Readers wanted a story, not a Choose Your Own Adventure novel with all of the endings torn out.