I don't think there are many people that disagree with the points this guy has brought up. But he doesn't really bring up the things that people actually are complaining about. There are many aspects of the UI that are very garish and not very polished. Sure, the UX might be great but people notice the UI first, and that's where much of the backlash is coming from. I think it's compounded by Apple's history of having their initial UI unveilings showing a much more polished look than they have with iOS7.