This is something those "defending" the harder-to-use/learn thing always bring up. As if affordances must always be relative to prior knowledge. But they're not (always) - some things just are harder to use than others (at least relative to a specific meaning of 'use').

Programming languages - you could argue Rust isn't hard to learn, by pretending that everyone claiming it is are just having trouble adjusting from javascript. But that breaks down when you realise the Rust learners finding it hard are actually polyglot programmers who are finding it harder than all the many other languages, in multiple paradigms, they have already successfully learned.

Similar with Linux - I find it harder to 'use' in a certain sense (the sense most people mean - which is getting all the ordinary hardware & software stuff working) than the others. You'll tell me it's unfamiliarity, but it's just not - my first Linux was Slackware on floppies, and I've used it alongside Windows and MacOS now for decades. I choose it for my primary OS for other reasons, but ease of use certainly isn't among them. I still have to fiddle more with it .