Zara knit quarter zip pullover sweatshirt sweater with military shoulders

Zara knit quarter zip pullover sweatshirt sweater with military shoulders. Size S. It is more flowy at the bottom. I had the piling removed but there may still be some pilling on sweater (tried to capture in pictures, review carefully). Also the seam is coming apart under the armpit but if you know how to sew this will be an easy fix.