RAW sharpness with darktable

Thank you very much for your answers.

@Claes : yes I do agree that OOC Jpegs are not what I want but, when it comes to small elements (hair or skin details) they are closer to what I expect (they elements appear thin, at least way thinner than in my RAW).
My Camera is a Sony A6000.
Even when i make sure there is no movement blur I notice this problem… And even if there is a small blur, shouldn’t the RAW development should reach JPEC levels ? (I mean, even if it’s too much, I don’t know how to achieve it).

@subliminal thanks for these settings. Even if I do find the result good in term of contrast, it feels that it doesn’t improve very small elements…
When you say “adjust to taste” : what exactly do you adjust ? I assumed you talked about Contrast Equalizer’s curves, as this is the module I found to have the most impact on the final result.
I tried to follow this tips : Up close and personal with the color balance module: An experiment. - #22 by Jade_NL but I never reached something “balanced”.

I do know I am not clear, and I’m trying to find a picture to show you what I mean about those small elements. But because I feel uncomfortable posting a picture of someone, it takes time to find a picture to illustrate.