Sometimes the curve is lost because the surgeon had to make the incision more laterally than we like. Dermabrasion probably won't help and you should wait at least 1 year. Fortunately, you don't walk around with this view showing.
Unfortunately, it is easier to thin the skin than thicken it but different filler materials could be used as well as possibly fat injections. Other material could be implanted surgically like fascia, alloderm, cartilage. I would recommend seeing a plastic surgeon for a further evaluation.
It is difficult to say from your photo but it could just be scar tissue from the incision that was used to do your surgery. It would be unlikely that you would have a deviated septum after a nose surgery if you did not have it prior to this.
