I get that iOS is now complex, and that new bugs will appear from time to time. But I don't get how things that used to work properly stop working. I got a reminder that I'd left an Air Tag at home (my bike - which I'd left at home because I'd gone out by car). In Find My, the 'remind me when left behind' option had been toggled ON by software. So I switched it off again. A couple of days later, it's back. Never happened on iOS16. Every few days I get reminded that I've left stuff at home, despite telling Find My NOT to tell me when I leave those things at home.
Try clicking off a repeating reminder in the iCould web app. All the repeats disappear too. Destroyed by GTD system in minutes, and took ages to rebuild. I almost had to to back to OmniFocus which, for all its faults, has never corrupted any data.
The Weather forecast used to be OK, now it's rubbish. It tells me it's sunny when it's cloudy (not the forecast - NOW), raining when it isn't and predicts ridiculous temperatures which are out of line with the local meteorological agency forecasts.
The Watch sometimes charges up to only 80%. Not optimised charging, where it's supposed to do the last 20% just before you need it, but not beyond 80% - leaving me with single-digit battery levels in the evening and afraid to even use the Watch.
The alarm complication on the Watch sometimes shows 'no alarms set' when there are.
I could go on......