One issue with raw is that the camera doesn't apply any of the "editing" that goes on for a jpeg, a normal jpeg would have some sharpening applied and would have the in-camera settings applied, some saturation contrast etc etc depending on the camera set up.
Raw doesn't have any of that, so if your conversion doesn't apply anything to the raw, just a conversion then it might look grim compared to the jpegs your used to.
Raws are really intended to be post processed in software like photoshop, or your cameras own software, here you'd ajust the sharpeness colour etc.
Raw offers more flexability and latitude with colour/exposure etc but does require more work to get the best out of it. Wayne