gtk - garbage toolkit

GTk is bloated trash due to its dependencies like GLib, cairo and DBus.
Qt4/5 is equally bloated C++ garbage.

OpenVG used to be a saner alternative to cairo, but it's fallen by the wayside and support for it in Gallium has been dropped and might end up getting removed from Mesa in the future.

So if you were to throw away gtk and qt, and starting from first principles, how would you go about building a minimalist themable widget library on top of GL/GLES for Wayland that can be used to build a desktop where applications have a common look-and-feel?

>>19,24,25
Multi-platform or native look-and-feel isn't a concern of the OP. The concern is creating a set of light-weight reusable UI widgets that does away with the baggage of X, yet gives you a standardized yet minimalist toolkit with which to build a functional alternative desktop, without going down the same SystemDiseased path that GTk and QT developers are heading.

What I'm trying to envision is a future for us where we don't have to bend the knee to shitty bloated software when it comes to our choice of desktop.