I’ve had the same experience. Switched to the pixel 6, had it for a year, bought the iPhone 15 Pro. I make a hell of a lot less than a lot of the commenters here, so the decision to do so was incredibly costly. I made it, in part, because I take a lot of photos.

At its best, the Pixel produces phenomenal photos. At its worst, they are horrendous. The iPhone consistently does well. With the Pixel I was getting disgusting over-sharpening, to the point I would screenshot photos as a few seconds after taking them. If I didn't screenshot, I would watch in dismay as the post-processing ruined it. The lens flare was frequently awful — lines that swept across the entire image. When I complained, the community said I should leverage this flaw in an artistic way. The video was awful, and the microphone was noisy. A few of my photos have had inexplicable black squares. Occasionally the camera lagged or crashed. My iPhone camera has messed up, but not like the pixel does.

I don’t know why everyone seems to think it’s better. Maybe somehow mine was defective, but I could find posts to corroborate every issue I had.