S24:

UI not confusing at all imo, just your typical Samsung Android. And obviously not slow since it’s a flagship phone

No ads

Not really bloated (comes with Samsung’s own apps + Google’s apps but you can uninstall most of them)

Decently fast updates

7 years software support (not only security updates but also 7 years of new Android updates)

Wouldn’t say 4000 mAh 50 MP sounds that fancy, but it works very well (lots of optimisation for the battery and good software for the camera)

Downside: expensive (~600€ new currently)