Lightroom import to dark, export to light

[robin38874029xbmz]

Since I am new to Lightroom I hope someone can help. 

Images imported images into Lightroom appear very dark and overly saturated. This goe for RAW aswell as for JPG files. If I ignore this and edit the file so it looks the way I want it and export is to a JPG the image appears way to light, washed out and very flat. 

If I view the same file in Windows (11) , Darktables or the Gimp it appeart just fine. Photoprints edited in Darktables look great. 

So the problem appears only in Lightroom; surely it must be a setting or something do not know yet. Has anyone experienced this, and found a sollution? 
The images below show: Raw file from camera, import into Lightroom, Edited in Lightroom, Export edited file on Windows.

[robin38874029xbmz]

For the record, It is just Lightroom, Photoshop functions normal.

[AlexJz]

Maybe a longshot but, do you have HDR enabled on the photo (in the Light panel)?

I assume you are exporting in JPG, default sRGB ?