[csdvrx]

Is there something like that on Linux that's gtk based but not as complicated as Gimp?

[grey_earthling]

Drawing fits that description, but it isn't really comparable to Krita — the authors describe it as like MS Paint but for Gnome.

Pinta seems similar, but more Xfce-ish.

=> https://maoschanz.github.io/drawing/

=> https://www.pinta-project.com/