At this point we need a Kickstarter campaign to make Lightroom run in Wine/Proton (no, no matter how much you try, it will not work so far). Edit: or GSOC to support Darktable to improve their UX.
If Darktable had a grant/GSOC just to improve UX, it could be a valid competitor to Lightroom. Currently, it's not. It's bunch of Python/Lua scientific code with some UI, that processes pictures.