The actual OS is fine
There are however, two rather large problems.
1) They've thrown out literally everything anyone has ever learned about designing WIMP UIs.
Thus while the OS itself is fine, the new shell they've put around it is actively user-hostile - perhaps not as egregious as Win 8.0, but close.
The amount of retraining needed is massive - switching to macOS would be a similar level of user training for the average person who just wants to get their job done with the minimum of fuss.
Switching 90% of corporate users to Linux would actually be easier, as shells exist that look and feel pretty much exactly like Win7 & 10. (The last ~10% have stuff that doesn't run well under Linux, so can't realistically use it)
Power users have it even worse, as a lot of the quality-of-life customizations are totally gone - and of course power users are those most likely to be using Windows-only applications.
2) The hardware requirements are batshit insane.
Some brand new, mid-tier machines can't run it at all. They'll still be in standard vendor support when Win10 goes out of support. If MS stick to that timetable the faeces really will hit the air circulation device...