Color Management + Darktable = dull images
I just opened your RAW file into Darktable, and with no adjustments I come with an image more like your "proper2.jpg" (just a tiny bit darker). Try to activate the module "Base Curve". When I deactivate it, I get that dull image. Hope this helps.
"When I get a little money I buy books; and if any is left I buy food and clothes" - Erasmus.