I own an iPhone 12 mini since its inception and I am 44 years old. You described exactly my problems. Somewhere on the road something broke, either me or the user interface. Also, the most painful breaking change for me is the fact that in safari the url bar is placed at the bottom since a while but I keep looking after it at the top of the screen while I type, even if there's nothing there, just something that resembles a dynamic dropdown list based on whatever I think I type. My brain can't seem to be able to accept and memorize the fact that the url bar was moved at the bottom, just above the keyboard.