Listen, I love GIMP. I would never try to argue that the UI/UX is better than alternatives. There’s a reason it’s not the defacto tool to use in its industry, and it’s not the name.

That said, if you take the time to learn GIMP, it’s delightful. I personally like using GIMP more than, say, Photoshop, but I also learned photo manipulation on GIMP, and didn’t touch Photoshop until well after. GIMP’s UX leaves a lot to be desired for a newcomer to the software.