It seems you are not so good on computers if you don't understand how upgrade works. you should not blame Microsoft and then say "I am switching to Apple" so why didn't you make a thread here? to complain and say that? then you could have switched and go to iMore and tell you story.
Anyway, some upgrades fail or are not stable because:
you installed alot of crap and it messed up with windows 7, then by upgrading Windows 10 had errors it couldn't fix. this applies also to drivers, you never know what will be supported and what not, that's a problems OEMs have, you could have really old hardware and then the driver wouldn't install correctly. You could easily try to get the drivers yourself, can you imagine 100% of people upgrading with sucess? that would be nice but it's a dream, because Windows 10 is controlled by so many OEMs and hardware companies that not even them update their driver database even if updates are available, so if you look for drivers it will say windows 8/7 and it never says 10 even if the drivers are compatible.
If you were technical and engineer and James Bond, you would know that clean install is the best thing to do, especially if you install a lot of things through the years. that can mess up with files. you could have run SFC /Scannow and see if it throws an error but I am sure you didn't. but then you blame Windows 10.
Explain me why Windows 10 doesn't have any bugs on my computer? (not important and visible ones that affect performance) and I am talking about a clean install on a desktop and upgrading a Laptop. tell me why? why people I have helped upgrading haven't complained about anything? well maybe if you were technical enough you would not complain and say "oh I am going to switch to Apple" like if someone cared. maybe you would upgrade fine your computer, and you would not expect an upgrade to work always perfect and if you upgraded and nothing works, why didn't you just clean installed Windows 10? again, anyone knows that it's the only way of having the best experience because while laptop upgraded fine, I understand there are millions of PC and laptop configurations around the world and nothing can be 100% success. not even on your beloved super apple, just saying.
Also you say interface is ugly? I am sorry but it looks perfectly fine for me, it looks really amazing on my eyes, so it's just your opinion, and millions of millions of people keep installing upgrades everyday, or do you think those millions reported went back to 8 or 7? it doesn't have anything to do with the way Windows works or not, and you could have seen in many videos or photos the Interface before you upgraded (or complained about it).
You are nothing, from the millions upgrading so I am sorry to tell you but Windows 10 is a success nad it will reach millions of millions soon, and I am talking about new computers and tablets, not only people upgrading. also Business in next years will upgrade to Windows 10 so your hopes about Microsoft dying, are just a dream, like 100% upgrades success for everyone.