Also harping on specific terminology like password vs passcode is not really productive in terms of improving the underlying UX, as the word gets translated into tons of languages which may or may not have the same level of nuance.
While I don't necessarily agree with the premise, especially when compared with the competition, I will say that iOS has not gotten easier to use over time. Features like 3D touch are implemented inconsistently both at the hardware level, and in the UX — Worst is how undiscoverable they are. Here's the crazy part: Apple is about to release the iPhone XR, their 1 and only phone without 3D touch!.