This. Whenever I find it boring to continue a game, I won't skip, I'll just outright drop it. I've done that with 3 Key games, Clannad, Little Busters and Kanon. Clannad because it's just too damned long and I had to get EVERY single little fricken route, even Akio's route, Little Busters because the common route was really tedious and I just didn't like Kanon. I'm having the same problem with Hoshizora no Memoria as I did with Little Busters (i.e. when will they get to the point??) Is Hoshizora no Memoria worth it?
As for Rewrite, each route is different so I wouldn't write off (no pun intended) the entire game due to one boring route