As a PC-only user since the days of DOS up till Windows 8, and having used Windows 10 after jumping ship to Macs a few hours ago, macOS has demonstrably more discoverability than Windows.
One example: Just click on the Help menu, in any app, and type something like "show" or "find" or any other operation, and it will show you all the menu items which have that word in their name.
That feature is a part of the Cocoa subsystem and comes for free with every app, and very handy when you know an app has a certain feature but you're not sure which menu it's buried in (like standard operations and filters in different image editing apps.)
Also, all the shortcuts and standard menus are the same in every macOS app, and can be discovered/modified from System Preferences -> Keyboard, again for any app.
Take "Preferences", which in Windows is sometimes under Edit, Tools, or the app name menu (which imitates macOS.)
I could go on and on, but "zero discoverability" is an undeserved hyperbole.