Not gonna say gimp is perfect. But, the comment above is a poster child for folks who learned a certain software and refuse to use another with a slightly different interface.
I personally learned Paint Shop Pro first, after baby steps of Mac/MS Paint. Later on didn't find Photoshop particularly intuitive... although liked 3.0 on the Mac. It's even worse now according to professional friends.
I've used many others over the years and never had a problem with basic to medium features. They all work roughly the same—WIMP. Point, click.
Gimp works similarly to every other graphics program, so using it for common tasks is not hard. It's not "full of grief." If you can't do it, you either never learned how to use a GUI program properly[1], proceed by rote, or refuse to consult the manual for more specific tasks.
For one thing, it's a helluva lot easier to learn than Blender, which has no chronic troll posts that I've seen.
[1] Not uncommon in web times. The original Apple HIGs might help.