issues with nuklear

[UtoECat]

Nuklear is a very powerful library as a library for the user interface... But also very limited as a drawing library. And this is not only the lack of loading images into memory out of the box, but also the terrible performance of rendering the waveform and spectrum.

Also, one of the possible inconveniences of nuklear - the inability to use keys to move between graphic elements - only the mouse and touchpad are suitable for this, which can create inconvenience for users who expect to use the keyboard.

What do I need?

Ideas and suggestions on how to speed up the rendering of nuklear in the form of a ready-made solution (I'm not ready to maintain another project) or good alternatives to nuklear (written in pure c of course. dearImgui is not an option)