Not Darktable, but quickly loaded in DxO and loaded it’s Velvia emulation, boosted exposure a bit and reduced highlights to not clip (the Velvia emulation darkens things quite a bit).
Then boosted it’s ‘micro’ and ‘fine’ contrast (kind of local contrast enhancements AFAIK).
Render out, resize it to 2000x2000 and apply some sharpening at that step. You see that lots of areas ‘are not bad’, but when looking at the unsized 100% of the original image, you’ll see that DxO tries to over sharpen things where it knows the lens will produce blur. The leaves on the left don’t look that great, but they try to make it sharp.
But the right side, is still soft. Maybe the wind was blowing there, or your right side is softer than your left.