My problem with "crossplatform" GUIs that run on Linux is that they aren't made to run on Linux desktop, they are made to run on Android, iOS, Windows, macOS, and finally Linux desktop.
All I want is a menubar, a toolbar, a statusbar, and some dialog windows. I don't want fading transitions when I click a tab.
It's crazy that I'm forced to write header files just to have a menubar.
Edit: I guess I should've at least asked myself if the question was rhetorical.