For example, the CMD+Tab task switcher seems natural, but it has an issue where you can select an app and it does absolutely nothing, which is both infuriating and incomprehensible. Is it ignoring me because the app is minimized? Did it send it to another desktop? I have no idea! It must be deterministic, but I'll be damned if I can figure it out. I am sure "real mac users" get it, and I'm happy for them, but poor benighted souls like me just wonder why their $2500 computer isn't doing what they're telling it to. And whatever that perfectly good reason is, there is an even more perfectly good reason to make it work the way users expect.
The Dock has the same issue with letting you click on an app, and then not bringing that app on screen, or telling me why it's ignoring my command. Both of the above patterns work better in Windows, and have worked better for decades, and Apple designers should be a little ashamed of that.
Mission Control is probably the most useful method, because it actually brings selected applications on screen (the minimum functionality you would expect). However, it does not support keyboard shortcuts for navigating and selecting an application! How is this possible? It feels like a couple story point ticket to me, yet it remains a problem after a decade. Maybe Apple stubbornly assumes everyone will use a touchpad for everything, despite them selling products without touchpads in them. For money.
The other problem with Mission Control is that it should not require your entire screen to switch apps. It feels too form-over-function to me.
I tried the newest entry, Stage Manager, for several months. It's like a cross between Mission Control and the Dock. It works well (that is, it does what it's supposed to), except it's missing the ability to change the size of the window thumbnails. It takes up quite a lot of the screen for the value it gives you. Not that being able to select a window and switch to it isn't valuable, just that that's how the Dock should already work, and Dock doesn't take up 10-15% of the screen.