Yea, I think they make honest to god bad design decisions that hurt usability. A common thread is hiding features / reducing discoverability while making no attempt at progressive disclosure, requiring memorization to complete certain tasks with the interface. This isn't only bad UX, it's an accessibility issue for users with attention and/or memory deficits. Creating a new paradigm is one thing, but with that comes the task of building affordances that help users with the transition, like skeumorphism did back in the day (...and to an extent, skeumorphism should have never been abandoned in the way it was...), something that the GNOME project simply does not do. They also ignore common accessibility recommendations, for example, by using icons without text in their applications, and utilizing mystery-meat navigation methods like hamburger menus, and ignoring long-established patterns for even very basic tasks, like allowing titlebars to become cluttered with interface elements leading to confusion when the user wants to move the window and widgets are in the way. I don't think it's bad at all that the GNOME project is trying to build their own paradigm, but they do so without consideration for the most fundamental usability guidelines.