Thank you.>-terrible pacing
I disagree for the most part. While some events, especially by the end, came very suddenly, everything flowed pretty well as both Yukito & Misuzu and What's-his-face & Kana's stories progressed slowly in parallel to one another.>-tried to cram too many shit into 90 minutes
It didn't all of the side characters you've seen in the AIR visual novel and TV series were rewritten as mere cameos. The director knew full well that a movie is a fundamentally different format from a visual novel, so he did all that was necessary to maintain a good pace.>-gave the protagonist guy a shitty personality, that completely differs from the source material
That's entirely subjective. He's just more broody and bleak. However, Misuzu was also made with less Down Syndrome and much more mature than in her previous incarnations.
I can see why some would prioritize adaptation loyalty over all, but personally, I prefer good storytelling, and I felt the movie did much better than the TV series did (lol Yukito suddenly turns into a crow?).