Yes, simplistic is the main reason.
There are simple things hidden too much and settings are very limited (no expert modes).
With Windows I can do anything, its very open and informative.
I can get a tool for any topic.
Ok, probably you can find that for Mac too somewhere, and you have the Terminal shell.
At some steps you HAVE to use Temrinal, to get simple things done (where I would expect a clever installer maybe).
Devices are integrated smoothly: YES
But there are so little devices available. I cannot even get a USB-C cable in a shop now.
Most keyboards, USB-Drived, other adapters do not work out of the box with Macos.
They really are not interested in 3rd party support, where Windows is vice-versa.
Why the hell do I have Thunderbolt, there are no reasonable or affordable devices available, its a total waste.
Also the whole concept of UX, some love it and say its easy, but I think vice-versa again.
Hidden windows behind other apps, a lot of flaws which I rarely see in Windows.
Windows concepts are much more simple user-friendly and clear IMHO (unfortunately Win10 is on the track of Macos right now).
Try to move a file with Finder, this is terrible, there is no clear Cut and past function for files, as far as I know.
Try to drop a file in a folder, you never know where it lands.
Macos still might have Wifi issues, sometimes broken connections, etc. A well known issues for many years now, probably
depend on the router and the settings, but nothing I would like to see in such a machine.
One the Pro side:
Trackpad is great, 2-finger / 3-finger guestures work smooth, elegant and flawlessly, never seen such perfect bahaviour on Windows.
Switching shells by swiping them is a joy to work with multiple VM machines.
Display is great.
Anyway, for me the Mac acts as host, and I'm running on Windows.
For that purpose its OK for me.