Just wanted to chip in on this with a similar experience.
I absolutely loved the camera on my 11 Pro but so far the 13 Pro has been a huge disappointment in comparison. It seems to try to pass off digitally zoomed/cropped photos from the wide camera when ostensibly using the zoom lens, even in conditions where the lighting isn’t remotely challenging. I can maybe understand it doing that in very dark conditions where f/2.8 is going to really struggle (though I wish it would let me make the choice myself, even then!), but this is happening often.
I was using it at the weekend to take photos of friends and family running the Great South Run. Glorious sunshine, brilliantly bright, but all my telephoto shots look like they’ve been run through a bad AI upscaler.
But going back through my library, I can find examples of wide lens shots that look extremely over processed too. Often in less than ideal lighting, but never so bad that my 11 Pro wouldn’t have got something usable out of it.
Im going to give it a couple of iOS updates to see if this is a software kink that’ll be worked out, but if not I think the 13 Pro will be going back.