I'm fairly sure this was just the straw that broke the camel's back.

There's a fair amount of arse-hatery in MacOS that by itself won't make you switch, but I can easily imagine it mounting up past intolerability. In fact, I don't need to imagine it, because I'm nearly there.

The iPhone is even worse, because at least on MacOS I can fix most the design decisions via secret settings in the terminal.