While I don't deny that your problem with Exchange is a pain exacerbated by some restrictions in iOS (like default mail app is the one Apple provides), you have totally and utterly failed to provide anything on the updates part while scarface74 provided facts on that very point that can be verified independently. "I don't know. There are too many" and "Sure there are" aren't answers that can be fact checked and verified. This sounds dubious for someone who claims not to use biometrics for unlocking (which, I agree, is a better security practice than using biometrics).
Perhaps you always keep flashing your device with some random OS fork or build and that hasn't allowed you to observe what others who aren't as savvy as you have to put up with (I get that you could use this exact sentence back in pointing out what you see as deficiencies in iOS, but let's not move the goal posts).