I agree, in my experience, MacOS is one of the most reliable operating systems I've used in terms of lack of crashes or spurrious bugs; the most common bug I see is my mouse pointer dissapearing, which is fixed by opening the tasks view.
If only they could so something about the truly terrible window switching crap, where you'll have to hit the same icon in your doc multiple times to eventually with a bit of luck get to the window you wanted. Why can't we have window previews like Windows has had since Windows 7 or just about every DE on Linux
hold down option when you release the selection to force hidden windows up. i too hate this behavior.
Right or control click the dock icon and choose the one you want. You can also press control-down arrow key to show current app windows or up for all windows/desktops.
My mouse pointer also disappeared for a time when it by accident crossed over to my iPad. After disabling that feature it never happened again.