it's not hard to use, it's just shit. you shouldn't need to run an antivirus in the background all the time, you shouldn't have to defragment your hard drive, you shouldn't have a 'I'm going to shut down in 10 minutes for updates unless you tell me to postpone it for a couple of hours" dialog. no other modern OS requires this kind of babysitting.
because John Q Public doesnt use any other modern OS, they have to make it easy enough for your 80 year old grandmother to figure out