Their idea of GUI building is just too bad and backward. You define the GUI by dragging things on a Canvas and some things that are specified in text. What you never want is going through thousands of widgets in a sidebar and a bit here and a bit there.

It suffers from we don't think about UI but only about technology. GUI Builder the old way stink (only XCode stinks like a perfume). There is also a reason why Microsoft does not offer a GUI Builder for their new WinUI 3