You what's particularly frustrating about Windows 8? The biggest problem it has is also its biggest selling point: Metro. As someone using Windows 8 and finding desktop mode to actually be usable (fried motherboard forced me to get a new computer), Metro is quite possibly the worst thing I've ever encountered in any version of Windows. Why is everything fullscreen? Why can't I start my computer in desktop mode? Why is the shut down option hidden under "Settings?" Why is the search bar on the right (especially when the results are listed from the left)? On top of issues with Metro's functionality (which, granted, are largely ignorable because I never use Metro).
But the biggest Windows 8 crime: Solitaire can only be accessed through Metro.
Also, on a very, VERY nitpicking note, why do they called it "Airplane mode" when I turn off my wireless adapter to plug in a wired connection? I mean, I just want to optimize and taking up both a wired port and wireless port on the router is just plain redundant.