It really struck me when the author says in the afterword: “I love girls who can’t be honest about their feelings,” because it really brings out the difference between how authors think and how a lot of readers think.
On the one hand, readers also do respond positively to characters who can’t be honest about their feelings—that’s the tsundere trope in a nutshell, and those are often very popular characters.
But for the “in denial” characters like Micchan, lots of readers are like, “OMG! She needs to get a clue!,” or they spend a lot of energy shipping Denial-chan with everybody in sight, including the MC, etc.
It’s pretty clear that for authors, such characters are an interesting technical challenge, in a way more compelling to create than a lovey-dovey lead (although here Sana is nicely conflicted herself—swept away by Ayane while struggling to come to terms with all her new feelings).
I guess the readers hoping for a change in characters like Micchan are responding the way the authors want them to, but I can see that keeping the characters in denial would be more fun to write.
I think it's just an issue of how long a character can believably stay in denial. Not to say that people don't stay closeted for huge chunks of their lives, but it feels like set up without payoff if they don't come out eventually. At this point, I'd believe Micchan's figured her shit out and is just sad because she got rejected before she realize.
I think most readers here have experienced unrequited love at some point and the sympathy pushes them to want the spurned character to have a proper shot at happiness. Also, in my experience, the third wheel always ends up being more my type lol