I suppose Microsoft should be proud, as they've now got people defending their new OS as rabidly as anyone used to defend Apple, back when it needed defending.
It's fine if you enjoy the new OS (and as has been noted, some folks really aren't impacted by it), but don't dismiss the valid concerns of experienced power users who simply feel it's a step in the wrong direction.
A quick Googling will show you that it's not just the lack of a Start menu (easily replaced with a free mod like Classic Shell, love it), but more substantial things like native Metro (even though that word has been stricken from all Microsoftspeak) apps requiring the full screen, or that the Start menu is now a start screen. The fixation on things occupying the entirety of the desktop is bizarre and out of place on a desktop OS. While there are certain things I do want taking up my entire screen on a 27" monitor, most applications don't fall into that category.
Yes, I know I can just run it in Desktop mode, yes I know I can run non-Metro apps in windows still (or buy yet another mod that lets you run Metro apps in actual windows). All that does is beg the question why they've bolted a mobile, small touchscreen-centric OS onto what was a perfectly fine prior OS. It also functions very wonky when dealing with multiple monitor setups, especially when you have to fool with the various hot-corner context menus. Again, fine for a mobile OS, really out of place on a desktop.
Of course, this isn't only why PCs aren't selling, and it kind of baffles me when I see some of the conclusions people draw from lower PC sales. Given that most folks sure don't have more money floating around in recent years than they did years prior, and they've got more choices when it comes to technology, they're going to have to pick and choose. If you bought a PC three years ago, your average consumer (or heck, even your average gamer, mine still handles new games just fine) might buy a new tablet or a smartphone instead, or put that money towards something else entirely. No one has stopped using PCs that used to use them extensively, but they've definitely spread out certain PC habits across multiple devices.
It's also a little deceptive when they talk about time spent on mobile or tablet devices, since often those are minutes or hours you'd never have spent on a PC in the first place (on the train, in bed, ignoring the family at dinner, etc.)