I see a lot of people overreacting.
I am up to date with the raws, and I won't spoil, but I fully expect this to go on a lot longer than what is available on the raws right now, and for every girl to have her moments and ups and downs.
In fact, I think it would make sense for the whole thing to last a full school year, so 360 or more chapters.
That said, I do root for Osanai, but I do expect that whatever girl "wins" in the end, it will be a VERY bumpy ride, with % going up and down.