MrSatan I think the abysmal state of mobile phone usability is based on a change in the manufacturers' motivations.
Take cars as a metaphor: For most of the 20th century, cars and roads were built with the intention of making your journey faster. Then, in the 21st century, traffic lights, speed limits, speed bumps etc are all designed to slow you down and generally put you off driving, because there are too many bipeds taking up space as the sole occupants of their respective five-seater gas-guzzlers, and it's getting more expensive to maintain the infrastructure as a result.
Meanwhile, for the past forty or so years, computers were designed incrementally to be faster, making the user experience more efficient and painless, because productivity was the primary motivator.
Nowadays, the mobile experience is hampered by seemingly arbitrary restrictions (ostensibly for security), poor UI design, buggy menus and constant obstacles to multitasking. This is because the primary motivator for mobile devices is no longer to be efficient information systems, but rather to sell you apps, to keep you in the walled garden, and where they can't sell you something, they bombard you with ads. I mean, I can turn on my kitchen lights to 22% brightness from the opposite side of the planet, but iOS can't even give me a damn file browser.
Here's hoping that the Librem 5 will change things for the better.