Old lady sweater

I recently thrifted a sweater that I've been wearing quite a lot lately, but despite that it's not in my usual style and I'm not sure how I feel abut it.

I do not normally wear long sweater coats, particularly of this shape, but I was drawn to it to use as a warm over-layer. It's actually a very high-quality piece, BCBGMaxAzria in a hundred percent lambswool that isn't itchy at all. It's also got unusual horizontal seams on the middle of the back and the elbows that spread out into triangles on either side.

I've been wearing it a lot lately because it's warm and easy to thrown on over whatever else I've got on. Trouble is, I feel kind of schlubby in it and that bugs me. I usually hate wearing things of a boxy shape, especially when they're oversized. Clothes that fit like that are the easiest way to make yourself seem shapeless, sloppy, or not put together, all things that I've been trying to avoid ever since I resolved to learn how to dress better. And from the back, well, let's say it doesn't make it my most flattering angle.

Looks like you could land on a plane on my ass. At least you can see the back seam better.

I never want to settle for looking like a schlub just for something that's comfortable and warm; there is always an equivalent that looks nicer that I could go for instead. I haven't been feeling terribly attractive lately, what with the weight gain and everything else, so I worry this is a sign that I'm starting to feel like what's the point, I'm not going to look that good anyway. I don't know. I go back and forth between whether I think it looks bad or whether it's a perfectly legitimate styling I'm just not used to on myself. I know it's just a stupid sweater, not exactly worth having a crisis over, but I do worry if it means I'm trying to hide myself because of not feeling pretty much lately.