Not 99%. Windows has many usability issues. I’d vote for “dont steal focus and stick windows in front of where I’m typing” and “don’t move things just as I go to click on them” for a start, and also “don’t somehow take an hour to delete 50 files.”
Deleting files was an amazing one already. Then I recently discovered the joy of deleting 30k emails from Outlook… T-T
I copied 400GB of assorted files in an RDP session today and Windows had to think for a minute or two, then copy them ever so slowly, then stop at 99% done, then crash Explorer and disable the start menu and taskbar and CTRL-ALT-DEL and all ways of getting to the Task Manager, and then freeze the whole machine so that I had to travel to the physical machine and hold down the power button, since when it has been unusably slow because Windows now wants to rebuild the RAID array, which takes days. This was a pretty average Windows session.