I think I have found my problem… but I still haven’t found a solution. I think the problem is that I have no output ICC profiles. darktable refers to two locations where these profiles might be located but oddly I don’t even have a folder there. I’ve tried adding an ICC profile I found online but it only slightly improved the export photo. I tried re-installing 2.4 but it wouldn’t work.
Any ideas? Maybe I could just download the needed profiles?