I know a lot of people don't like that but sometimes I feel that FOSS projects are intentionally sabotaging themselves by ignoring industry standard options/conventions and instead they are following open source ideas just to be different. GIMP is the perfect example of that and generally speaking UI/UX is the main symptom.
Blender was able to move forward by not listening to the FOSS crowd but to the industry. And see where are they now compared to GIMP.