Them being together or not isn't even my biggest sticking point, tbh -- though honestly, I really would have preferred if Uta moved on and they just stayed friends, no moving back in, etc.
But the author definitely moved the story in the "they're ending up together" direction... but then kinda didn't commit?
The double time skip is what really got me, and then to do that plus leaving it even slightly ambiguous just really makes Uta's character far worse, especially with the "I'll just hold on to this unrequited love" resolution. If they aren't together at that end point, then she just moved back in, basically regressed and now has resolved to live her life with someone who doesn't feel the same way, but they apparently act like a couple...?
I'm pretty sure it's meant to show they are a couple now, but with that being the case, it just feels slapped on, and their relationship absolutely needed more build than a couple panels and a greeting.
That's not even getting into the other story threads.
This ending is just... big oof. I honestly thought we were gearing up for a "final arc" after the divorce that got them together more naturally, and resolved things much better, with adequate payoff. My mistake lol. Sigh...
I'm not going to swear off the author's works entirely, but the next one I read I'll absolutely be cautious of. This honestly just feels like it got axed too soon or something.