This is such a contrived argument. Windows 10 is actually *exactly* like Windows 8.1 and if you didn't notice, your precious Start Menu is just the Start Screen, but smaller. Mind blown.
But it puts you and your argument in a curious spot. People who actually liked the StartMenu of old, and its fascinating retardedness, balked at Windows 10 as well and installed 3rd party apps to get the "original" experience.
So evidently you just ate up the equally intellectually challenged diatribe against Windows 8 by people who just had no idea what they were whining about. Windows 10 is Windows 8 with another number at the end of it.
Apparently when the Start Screen is packaged into a pseudo Start Menu, it's teh amazingz!! You could have saved yourself a lot of grief by thinking for yourself, gotten to know the Start Screen, end of story - instead of whining about Windows 8 for who knows how long and *then* get used to the Start Screen in Windows 10 and claim it was good all along.
You have no idea what the hell you are saying in any way. Have you used windows? at all? I've been using Windows since back in the days of 3.0.
I've also been using OSx for a good chunk of my life.
I've also used Linux extensively. BSD variants, I get stuck using AIX and I've even had some fun playing with OS's like OS2 warp, and BeOS.
There are pros and cons to every OS. Windows greatest strength is the "STart" button. Because of it's simplicity at putting virtually every single User interaction in one spot that is easy to find and use (although in Win 8.0, its removal was disastrous).
The "metro" start tile screens is actually quite a joy to use. The FULL SCREEN nature of it was NOT. don't confuse the two. The problem with 8.x's start screen wasn't that it changed to tiles for icons instead of lists of folders, but that it was workflow breaking. Opening start menu completely broke your workflow by overriding your entire display with itself. On Top of that, the biggest knock against Windows 8 was not even start menu related, but the multiple personality disorder it suffered from. There were two sets of settings, in two completely unrelated places. Windows Store Apps could only run full screen, or 1/2 screen. and the Desktop itself completely operated in it's own world. there was very little flow and it was purely split in nature.
All of these issues have been remedied in Win10. The start menu preserves the benefits of the live tiles (and whether you like that or the old folder list is subjective, can't change your mind there), while returning to the old, workflow friendly start menu functionality of being unobtrusive, and an All in one place to do all your OS level interaction.
I'm not sure why you think the start menu was "retarded", other than you have your own personal preference. And that is ok. OSx is a great OS too. The Dock is a wonderful feature, so much so that Windows had incorporated similar functionality to the Taskbar back in windows 7. OSx's Application management is far simpler, and far greater. And it's trackpad support beats the pants off anything windows has to offer, even in Windows 10. Expose, while mimmicked in Win10 is still better functioning. But OSx still suffers from a UI disjointedness, that isn't necessarily easier for everyone. They need to do something to unify Finder and the Dock. And, while I have yet to get El Capitan installed, Their fullscreen multi-window support looks more like Windows 8 than I wish.
In the end of the day, Both Windows 10 and OSx are fantastic Operating systems (Although BOTH could use a filesystem overhaul). You wont go wrong with using either if you have the programs you want on your choice. But your need to insult it, while not providing any anecdotal, tangible, or even statistical reasons why its' "retarded" only makes you out to sound like an ignorant individual who has no real experiences with different operating systems.