Matte Leggings

This is the first time I review a pais of leggings - I am just baffled. I am 5”4” and wear size 6 . My body is easy to dress, any leggings fit me ok. Usually I wear size S for Nike leggings but got these in M. First of all, I love skims and have a few Nike x skims items that I really like but I am so confused about these leggings. They are super stiff and I broke a nail trying to put them on. Once I finally did it, they are super tight on the legs and lower tight and loose on the waist. My glutes never looked so bad on a pair of legging and because they don’t come all the way up, I could feel my buttchicks touching while walking which was a very weird feeling. They look really bad and I am so sad I removed the tags and can’t return .