The anime ending, which basically takes something that took less than seven pages to resolve and stretches it to a whole episode, and what's more, turns it more or less like something out of an action movie,and what's more not only messes with the characterization of characters — specifically Amaterasu, who in the manga who would never just sit there and watch while Uka faded away, and in fact did everything in her power to stop it — it also gives a far different message than the manga itself, in that Humans and Gods can never be compatible. This is contrast to everything the manga has shown so far of interactions between the divine and mortals.
Chapter 39 many people became angry when Sanjou declared she wanted to be friends with Sumizome. Mainly because it seems like this is the resolution to their character archs and relationship. Many cried foul and accused the author of being a Heteronormative Crusader since Inari's hetero relationship had just been upgraded and Touka and Uka's hetero relationship also got upgraded in the next chapter. While the lesbian relationship went nowhere.
Which was made even worse by Word of God, when the author admitted they were unwilling to give the lesbian relationship an upgrade, and tacked on the Romantic Two-Girl Friendship angle and Sanjou's Asexual orientation to suggest that it would happen eventually... but not on their watch...
Les Yay: There is a bit between Sumizome and Inari when the two first start becoming friends, which acts as a bit of foreshadowing to Sumizome's orientation.
The Scrappy: Inari herself. A lot of readers find her to be irritating and selfish and find her relationship with Tanbabashi rather annoying overall. For a lot of readers the main draw is the Touka x Uka relationship which comes off as far sweeter and far more heartfelt.