GIMP is way over-promoted by FOSS zealots who usually can't accomplish much more than cropping a picture and applying a few filters to the entire image.
This. I really, REALLY want to use GIMP; I do. And I've tried; several times. But I just can't. It's just too clunky and slow and not well thought out in any reasonable manner. Windows pop up in wrong places with wrong Z order, making them impossible to find sometimes. *Common* features (like adjustment layers) are simply missing or work in horrible, horrible ways (like drawing a @#$!@%$ line with an arrow point end).
No, GIMP is not what some people make it out to be. I'd rather use an old Paintshop Pro 6 release than anything GIMP related. And I would except Corel does a better job at screwing up their own products than any other company I've seen in ages. I've actually bought and paid for several versions of Paintshop Pro in the past decade only to have my license mysteriously stop working. "Too many installations" they say. But this message comes up randomly when I haven't done any new installation in months. And then, suddenly, my workflow is halted in its tracks and I'm back to trying GIMP one more time.
My requirements are not steep. I'm not a pro graphics artist by any means. But there doesn't seem to be any good open source graphics editors out there and Krita doesn't seem to fit the bill either. Bah.