Body shape police
Why would you want a shorter neck, and from the pictures its honestly not that bad, I wouldnt call it long, but "big" is a perceptual term. Not to be rude, but you are slightly overweight so that just might be why you are getting those sort of distorted visual. The outfit looks nice, I'm not in love with the sweater with the jacket combination though, It might been better with a simple v-neck. love the Chukkas btw and the overall fit is quite nice.