They did it to themselves
Putting the political issues between USA and Russia (which is enevitably going to spill over to Microsoft if it wants to do business in Russia), they took a perfectly good, if not excellent operating system, and wrecked it. They wobbled with Windows Vista but managed to get firmly back on track with Windows 7, which, remains a great OS IMO.
Then they fucked the whole thing up with Windows 8, and doubled down with Windows 10.
They did it to themselves.
I currently run Win7, which will be my last MS OS. I'm dual booting with Linux Mint. It's taking a lot of getting used to, but it seems to do pretty much everything I need/want to do.