This is just to explore alternative ways :)
You could try to mirror wing sections and loft whole wing than move some points of yellow section until you have a better shape





my suggestion is also to pay attention how to manage points in wing sections
supposing you need to blend wing+fuselage surely it failed because wing is too sharp
avoid also to have the seam of the wing just in the sharpest part
use MarkCurveStart plug-in to control each section and move it in neutral position




red one is a section of your wing,blue one is how i managed points in that area:
avoid to put a point in the sharpest part,give more distance between them to have more rounded shape
this allows to blend or fillet to have more space available to work

M