The main thing I hate about 10, is that it keeps doing crap without asking you ...
This! Very much this.
One day I looked at the Windows 10 system that I run (rarely) and noticed it had installed Candy Crush Soda Saga. What the hell?? I didn't ask for that crap to be installed and I sure as hell didn't
want it, yet Microsoft rammed it on to my system without asking permission.
Earlier updates had the annoying habit of resetting app preferences. You used Firefox as your browser? Hey, it's now Edge! You had Sumatra as your PDF reader? Hey, it's now Edge as well!
Then there the whole "you don't own your computer and you don't have any say over what updates we'll decide to send you." That's
scary! It's almost inevitable that one day Microsoft will screw something up and wipe out hundreds of thousands of PCs. That will affect a lot of people and businesses.
Even today people about to give a presentation have to postpone or even cancel it because the idiot computer they intended to use for the presentation up and decided to install an update. And I
hate it when I'm doing a minor fix on a customer's computer, restart it, and then it goes "Installing updates, please wait."
Wait for how long, though? Will it be a simple two minute update or a 45 minute upgrade? The blasted computer won't tell me! That's another thing I hate about the latest versions of Windows: its totally reluctance to give me any useful information on its activities.
I lost all trust in Microsoft when they tried to force Windows 10 on all their users, even going so far as to hide the update in a patch marked as "security" related. If Microsoft is doing that crap right in your face, who know what the hell they're doing in the background.
I'm sticking with Linux, because I don't have to put up with the all the BS that a private unaccountable corporation wants to shove on to my computer.