This matches me and my wife. Most other free image editors fall short in some useful way or another, and Photoshop is obscenely expensive for amateur uses. It's worth spending a bit of time learning the pieces you want to use to avoid the endless frustration in other tools - the rest can basically be ignored, unless you really want to learn the 'gestalt' of the whole thing.

It also helps motivate us that the vast majority of free image editors on OSX are infinitely inferior to e.g. Paint.NET.