Ah, the elitist GIMP crowd. The most toxic OSS community. Those are the same people who won’t do any gaming on Linux because they refuse to install proprietary software. They’re all sweaty middle-aged men with unwashed asses, neck hair thicker than their chest hair, and an allergy to women who are allowed to speak.
Yeah, if you do any sort of work with art or photography, and you use Linux, you run into them at some point. To be fair, it’s not GIMPs fault that they rally around that software, it’s just a subset of Linux users who like to stick their noses in the air that consider GIMP the only valid choice since it’s FOSS. You also see it sometimes when a Linux newbie asks for opinions on a good starter distro to get their feet wet.
Fortunately, with the increased popularity of Linux with desktop users, and of course the golden age of Linux gaming being upon us, those sort of people are becoming a tiny minority. I have faith there will be a point when they’re so few that they get ostracized from communities unless they stop being fucknozzles.
I refer to that "the devs like it shitty" thing you get out of moderately old FOSS software "GIMP syndrome" because GIMP has it the loudest. A legitimately capable piece of software that you're an idiot for using because good UX is considered a bug by the developers. Best to just let it die in obscurity and create something new from scratch than attempt to fork it.
Problem is that if you're looking for FOSS software outside of the absolute most mainstream use cases, that type of software is the only available option. GIMP and Inkscape have been mentioned but throw FreeCAD into the ring as well. Shotcut and Kdenlive are passable, but don't quite measure up to the commercial alternatives.
My particular hobby horse is CFD code. OpenFOAM is fantastic from a technical standpoint, but until recently, to actually use it you either had to buy a commercial front-end, or literally write C++ header files to set up your cases. There's a heroic Korean developer who's put together a basic but very functional front-end GUI in the last year to change that, but it only covers relatively straightforward cases at the moment.
I don't think Inkscape has GIMP syndrome; it's my understanding that Inkscape is just missing some features that make it a non-starter rather than a deliberately shit UI.
FreeCAD has GIMP syndrome which hopefully will soon be remedied.