I think a positive comment is necessary among this pool of negativity.
The Manga deserves a lot more praise and a lot more recognition, what with its excellent storytelling and superb art style. The characters were very well-thought out and manage to grip you in some really emotional moments, such as Nene pulling the stunt at the restaurant.
I don't mind Poly ending in the slightest, fiction is made for fictional reasons, and the standards I have for real life differ from the ones I have for fiction, for that I absolutely enjoyed this story and found the three's relationship to be absolutely sweet and heartwarming.
10/10 on my side, I have no complaints.