I tried the Pixel 4a for a week recently and I came to the same conclusion. Android is getting better, but iOS is just much more refined, especially in combination with the Apple Watch, IMO.
iOS apps are still designed better (even YouTube’s own iOS app is cleaner than its Android app) and they actually follow iOS design language. I couldn’t find a browser alternative that matched even half of the functionality of Safari. I kept missing notifications/receiving them late/getting them all at once upon unlocking despite ensuring that all the battery saver options were off in settings. I’d wake up to about 20 Twitter notifications in the morning on my iPhone and to only 3 or so on the Pixel. I don’t like how the font size for all apps is controlled by the system font size. Also, I think the notification shade is really clunky. Why do I need to expand every notification in order to read it?
There’s a lot I liked about the Pixel, but these issues remind me why I stick with iPhone. It was nice to scratch the Android itch, though. I’m so bored with iPhone, but, man, does iOS do it right, IMO. I don’t think I’ll be trying the Ultra after my Pixel experience.