This particular iOS thing has also been annoying me since I upgraded to iOS 13 (which for the record, has otherwise been very positive for me). I really wish they had done some kind of "Here's what is new" tutorial.

Rearranging icons in folders is still a clusterf--k though - am I the only one that ends up fighting sometimes just to a) get the icon into the folder I want and b) actually keep it there without accidentally scrolling the screen, accidentally dragging it out of the edge of the folder because I'm trying to page it to a particular place?

What I'm noticing with iOS in particular is that lots of 'hidden' functionality is creeping in. This is something I remember Microsoft getting criticism for with Windows 8 -- non-obvious gestures like swiping from the edge of the screen to bring something up. Apple seems to have wandered down that same road.