Girlfriend Collective Dress with built-in shorts

Girlfriend Collective sporty dress with built-in spandex shorts. I wore this once for some lawn games during my wedding weekend, but it's otherwise not my everyday style so looking to help it find a new home! I often wear a small or medium (or size 4-6) and this felt borderline tight for my personal liking, but I think that's the style! There are a few small stains (shown in pictures) that I haven't tried to get out, but I imagine wouldn't be too hard to remove