Unless 3.0 has solved it, the gimp has a steep UI problem and a learning curve such that mass appeal on the website would be inappropriate anyway. I love it but I love it because I’ve been using it my whole life and know it very well. Foss in general struggles with useability due to a lot of hard to overcome problems - mainly, that by the time someone is ready to contribute to any given foss project, they’re already intimately familiar with its foibles and probably have strong opinions about what UX elements are sacred cows and should not be fixed.
I mean, I could make a list of things I think are problems, but I’ve been using it since a bit after 9/11 so I dont think my guesses would represent new user experiences. I am mostly going off what people tell me when they try to learn it.
I wasn’t writing advice for the devs, I was making a general statement about why foss stuff doesn’t tend to suit glitzy, highly marketable front facing stuff, using gimp as an example