Point taken on GTK, and I can't really disagree since I haven't even poked at writing a GTK GUI in many years.

But, you still couldn't resist complaining about the UI implementations, which sounds more like complaints about GNOME apps and GNOME Shell. Who cares if you think that GNOME Shell looks like it accommodates touch screens? Firefox, for example, uses GTK and doesn't seem to look like a touch screen UI to me as I'm typing into this text box.

The problem isn't that they accommodate touch screens, but that they do so at the expense of keyboard and mouse users, and then they push these changes to GTK in a way where keyboard-and-mouse interfaces become clunkier and GTK-developed UIs become very hard to integrate with other desktop environments.

Firefox has definitely been affected by this. The hamburger button is a touch paradigm which makes no sense on a large desktop screen with a mouse and keyboard-control scheme. It only serves to add more clicks to every interaction. Likewise the reduction of the scrollbar to a scroll indicator.

I was sad when Gnome 2 became Gnome 3 because I really liked Gnome 2 and Gnome 3 was broken. Then I moved on, but where ever I went insanity from the Gnome project kept leaking and making UIs worse.