This is the ending it deserved, it opened and went for such a strong solo-yunna route with funny harem shit but then that Chisaki shitty crap happened and people wanted that harem end or just a chisaki end for whatever reason. Good ending
The ending in itself is fine, Yuuna deserves her happiness and she has always been the one closer to Kogarashi. It's just that after this arc I was really hoping for an harem.