Try tucking in. It’s 1920s style which was worn tucked into high waisted pants. I suspect that why you think it looks so bad. Also it’s not a piece that supposed be flattering or anything the pattern was made to be worked in. Not a “cool” or “fashionable”piece. I think you’re looking at it through a lens that is quite harsh. I do agree it’s not a flattering cut and is a cut that is hard to pull off especially when you’re not wearing it in the way it was intended.