• The fucking home key doesn't even work properly, you have to do some weird ass key combination that I can't remember to get back to the front of a line of text.
• Sometimes you hit the wrong key combination by accident, or have the audacity to click on the desktop, and suddenly every application you were using flies away.
• Installing a downloaded application sometimes is just not fucking allowed without messing around under the hood because the app developer didn't pay Apple's fee to mark it "safe".
• The non-App Store installation process is confusing as shit. You have to click the "installer" disk image in your downloads to mount it, then click on the icon on your desktop (assuming you already knew it was going to show up there), which might then display a weird dialog with two icons just sitting there, and oh yeah you're supposed to now also drag one of those icons and drop it over the other one, then unmount the disk image from your desktop or else it's maybe confusing for your grandma when she uses the computer later and wants to run that application, like WTF is this process? Just fucking do the install and get out of the way!
• If you want to do anything that doesn't happen to have been blessed by Apple, you probably have to pay some asshole for an app that might maybe provide some hacky way to do it until a macOS update changes how shit works and breaks it.
• Maybe it's just me, but mouse clicks and general UI feedback from input on macOS feels incredibly sluggish all the time. I suppose they have subtle animation effects that are causing that, I dunno, but it always feels vaguely like trying to run underwater, and I've got one of the supposedly awesome Silicon M2 Mini purchased new within the last year, so I don't see why it should be anything but snappy.

Just a constant barrage of basic established UI stuff functioning fundamentally differently for no apparent good reason is so god-damned frustrating in that pile of shit OS. I'm a technical user, so I can eventually figure out how to get done whatever I need to eventually, but holy fuck I don't know how regular people manage in that usability abomination.