Earlier quoted context omitted.
Anecdotally, every iphone I've tried since my iphone 11 pro seems to take worse photos. I do take a lot of photos with a standalone camera though so I imagine I am biased.
I can't remember which generation exactly had this shift, but yeah around the iPhone 12 they went really heavy on the processing, so instead of a noisy but sharp image you got a smudgy mess. Later generations improved on that but you still see this when zooming in or in low light. The processing pipeline also started imposing its own opinions on your photos, adjusting the brightness of dark areas and bright areas to…
Part of that is due to the larger sensor which no phone is going to be able to compete with, but it’s also because it allows contrast to exist and photos don’t turn into smudge/blotch soup when zoomed in a little. Thanks to that, its photos capture mood better and feel closer to what I see (or remember seeing).
I’ve toyed with alternative camera apps (of which many exist on iOS) and those are a bit better, but still fall short of an decade+ old standalone camera.