If you're downhauling and the wrinkles won't go away, I'd say the bolt rope has shrunk and needs to be "relaxed".

The rope inside the luff of the sail shrinks and can shrink A LOT, often a foot or more. You want to downhaul the sail material, not the rope. The rope just holds the sail in the track. The sail is only held to the rope with a few stitches top and bottom. Cut those bottom stitches and downhaul the sail and the rope will pull up into the sail quite a bit. Now the sail will slide down an extra foot, smoothing out the wrinkles and correcting its shape.

You'll have to feed a new bit of rope up into the pocket and stitch it in to keep the new piece from falling out. Alternatively, you can melt the new piece and fuze it to the butt end of the old before you cut those stitches. Then when you downhaul it will draw the new bit up into the sail.

Don't let anyone convince you that you pull on the rope. It does NOT need to be continuously strong top to bottom. It's only there to keep the sail in the track.

Look at your photo. You can see the wrinkles and yet your downhaul is tight. 15 minutes will fix it and add 10% to your upwind power.