More than any other OS, I would say Windows 10 has a buggy and half-finished feel to it. The way it puts 'unidentified' SID's all through the registry - and Microsoft says you can ignore the numerous errors in the system logs.. or the way it always seems to decide to interrupt your work and install gigabytes of updates - and keep extra gigabytes of 'backups' in the windows.old folder..
I swear the biggest problem is people not holding Microsoft accountable enough. Microsoft should be getting their asses sued off by everyone and their mother. Whether it's 'software as a service' or not, they should not be able to override user preferences with impunity - or shut down industrial or medical systems because they miscalculated on an update. It's one thing if they install updates automatically - it's a totally different thing if someone disables those updates and Microsoft overrides it and returns all user settings back to their default every update. Or, if Microsoft just decides they're entitled to all of your screenshots, keystrokes, and contacts list.
Besides the bugs, the GUI is inconsistent and has shitty performance. It feels like you're opening a web page browser window when you navigate any of the new style of menu. There are at least 3 different distinct styles of menus and certain settings are in some or all of them. For example, there are mouse settings in the old style control panel and the new settings menu - and they aren't even the same settings - so you have to go to both.
It cannot get the resolution perspective correct in any manner.. And, if you set it the way you want, it might be returned to shit after a reboot - or you plug in a different monitor - or you remote desktop from a 4k monitor on a tablet that THEY designed. The fonts are hard to read no matter what - unless you have an old shitty low resolution monitor. Also, updates cause you to lose settings.. like you cannot make fonts bold in the menus after the latest Windows update.
Windows 10 forgets and re-arranges user settings. Did you move the 'documents' folder? Windows 10 might just decide to delete wherever you moved it to and move them back. If you use OneDrive, plan on re-installing at least once a month.
The snipping tool is a big flaming piece of shit. If you capture a screenshot and then click 'new' screenshot, your existing screenshot right in front of you disappears.. So you can't just have multiple screenshots sitting on your screen at the same time - unless you take the time to save each one. Fuck that. Nothing should ever delete your existing work just because you clicked 'new.' Instead, it should open in a NEW window and keep your existing one.
The way they install updates as if they are entitled to controlling you is unacceptable. Everything about it is the opposite of common sense. For example, updates typically install when you want to turn off your laptop and take it home - nope.. sorry.. you gotta fucking wait. Don't turn off your computer or we'll break it. Have a laptop you use only once or twice a week? It'll decide to waste your battery doing a bunch of bullshit rather than just let you get your work done. I know it's not supposed to interrupt you in the middle of anything - but I have had it interrupt me in the middle of playing a PC game against friends. WHAT THE FUCK.
I use it since I have to support it (secondary to Mac OSX). It pisses me off every day. No one on the Windows 10 team should feel proud of the shit they help create. It's taking computing in the wrong direction. It's making computing less reliable. The philosophy of Windows 10 is shit. The fundamental design is shit. The people that work on it are shitty people. The people that stick up for it are ineffective people who have never experienced software that was designed well.
The really sad thing is that almost all of it could be fixed by doing the following:
1. Allow the user to have control over his or her computer again
2. Allow the user to HAVE CONTROL OVER HIS OR HER COMPUTER AGAIN
3. FUCKING ALLOW THE USER TO BE IN CONTROL