I have to use an iPad for work. I was also forced to use one of their phones as a while back. I have unhappily used the iOS system for about 7 years now.

A few additional things:

I have attempted to use multitasking on it. Every update changed it's behavior and they are all unintuitive. I gave up and use my phone for the second task.

The settings menu can burn in hell. It's an absolute hot mess that's worse than anything else I have seen.

I use a Bluetooth keyboard at times. In order to use it I have to leave an annoying floating "accessibility" circle on the screen when it's not connected. In order to turn it off, it's buried somewhere in the hellish settings menu.

Apps crash about 2x more often on it than on any other system I have used. Especially after an update before the inevitable small fix comes out a few weeks later.

The updates go through an endless cycle of adding bugs then killing bugs then adding new bugs. One of my favorites bug was when I had the phone years ago. They somehow broke the search functions in contacts and took them 4 months to fix it. My company had loaded 3,000 corporate contacts Into the phone... Fun times.

Then there are all the hidden gestures that are completely illogical. I turn gestures off on my android phone for a reason.