Your message intriguing... Can you point to some specific examples of frustration? I've never used Photoshop, but as an occasional user of gimp it seems quite natural and intuitive to me. I'd like to see what could be greatly improved about it.
I agree - I have used the gimp since 1998 and when using other apps (e.g. Affinity) I often return to Gimp and Inkscape because I understand their UIs best.