Coming from Android, I have exactly the same response when moving to iOS. 'Why is there no back button? Why is all the functionality shoehorned into one button? Oh, you have to press the button for certain amounts of time for different features? Where's the discoverability?".

You seem to be complaining much more about unfamiliarity with workflow than real issues.

In my experience, people are drawn to Android don't care much about user experience and instead want larger screens and tons of features.

Did you honestly just say that a larger screen doesn't have anything to do with the user experience?