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.
otherwise it's hard to respond to such a vague statement
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