I thought that MS had a good thing going on with the refinements in Aero brought by Windows 7. It nicely balanced a modern theme with a traditional desktop model and it still respected the user while bringing some massive QoL improvements.

Had Windows 8 been further refinement into the Fluent design language along with unifying lingering Win9x style panels into the Vista/7 style, it would’ve been massively popular and more beloved by users than XP or 7. Instead, Microsoft decided to forget non-touch devices entirely and saddle the desktop with an ugly theme reminiscent of Windows 1.0/2.0 in a botched attempt to make it fit in with the flat Metro touch UI bits.