My main complaint with iOS(12) is that there is no quick way to disable WiFi. It's frustrating having to go to Settings -> WiFi multiple times a day for such a simple task.

Some times the networks the phone picks up don't even allow internet access right away, and any apps which requires an internet connection simply stops working.

I get the reasoning for making it easier for people to not waste their data. But I don't see why that requires adding so much friction to the rest of us.