> GIMP's UI consists of medium grey on slightly dark grey with occasional third shades of grey. It's low contrast and not particularly accessible.
I agree that's bad. It used to have colored icons. You can change the themes in preferences so it uses colored icons, again. The background color is also changeable. So, yeah, default theme got bad, but it can be fixed in less than a minute.
> GIMP's UI is spread across a huge pile of small windows with overlapping jurisdiction such that you're never sure where anything needs to go.
Configuration over convention, I guess. It does remember where you put said windows for the next time you launch it, so just put them whereever is best for you.
> Oh, when I paste, it doesn't offer to expand the canvas. That's unfortunate. Let's expand it manually and paste......but it still tries to paste into the tiny rectangle I originally had rather than the whole larger viewport. I give up, I'll manually guess a few sizes until I get close.
I think your expected behaviour is too ambiguous. Where should it expand to, the right, the left, up, down, all sides equally? You can "Paste as > New Image" (Ctrl+Shift+v) and you'll get an image the exact size of the image you're pasting. Does that help?
> OK, let's edit my picture. I click on the paintbrush tool in one window......then select a brush in the "Layers - Brushes" window, but it's too big. How do I fix that? I look for the "Brush Editor" window (different from "Layers - Brushes") and see a "Radius" selector. But it's read-only and I have no idea why. I have to go back to "Layers - Brushes" and find a tiny "Edit this Brush" button.....then go back to the "Brush Editor" window to make changes.
Where are you seeing "Radius"? I see "Size" and I can't get it to be read-only.
> Let's add some text to my window....oh, the text properties window appears over my image, translucent (even less contrast!) and the font select window is.......a free-form text box? No dropdown to see the names of my fonts, much less a preview of them?
If you start typing the name of fonts, you do get a dropdown with names and previews. I do agree it would be better to be able to make it drop down without requiring any text input, though.