I just returned an iPhone 11 pro.
I got a Pixel 4 through Google and the battery isn't horrible, but certainly isn't great. It's about the same to slightly worse than the Pixel 3 was.
I didn't want to go to the Pixel 4 XL, since I don't want a larger phone.
I got an iPhone 11 Pro through Verizon, since there aren't a lot of other options in reasonably sized phones. I had the iPhone for 2 days. Lots of little stuff was annoying. For example the navigation gestures. You generally swipe in from the left side to go back and it works well right until it doesn't. Occasionally you'll open something and the back gesture just doesn't work.
Email with my Gmail account and was delayed by about 30 mom on the built in mail app. Downloaded the Gmail app to get around that and email pushes properly on the app.
The built in calendar has no week view, which I find the most useful to get an overview of my week. Again it can be fixed by downloading the Google calendar app.
I had multiple instances of imessage refusing to send a message. I typed it and attempted to send it, the send button was unresponsive. Nothing happened until I backed out of the message and went back into it, then I could send it.
And of course the obvious, the home screen and lack of widgets. Missed having easily accessible info on the home screen.