Sooooo it's all just back to chapter 1? everyone still has the same knowledge they had about each other, nothing was resolved, no progress was made on any front, they're just three friends? Tsukasa will still hide her feelings while rooting for Washio, Kotooka will still subtly reject Washio every day while keeping her distance from Tsukasa, and Washio will remain oblivious to the other two.
So literally NOTHING changed in 23 chapters? Only the two dudes made any semblance of progress (in a yaoi subplot that didn't affect the main trio in any significant way) but even that relationship went nowhere as Subaru never came clean about impersonating Tsukasa.
And yeah, not all stories need to have a complete resolution. But this wasn't even a "coming of age" story, because while the girls each had their own introspective moments, they never came to terms with their own feelings or situations in a way that would let them move forward. They are the same exact people they were in chapter 1, they didn't grow or learn anything. Tsukasa is still sad about Washio. Washio is still chasing after Kotooka. Kotooka still thinks being a lesbian is bad and that everyone needs to get a boyfriend and become "normal".
What was the point here?