sequined prom selections with rose gold

Please tell me why plus size clothing at the mall is so bulky and unshapely? I'm not looking to wear a thick ass tshirt with "short sleeves" going a third down my arm and then having dresses hang on me like a brick sequined prom selections with rose gold
Can't fit into larges often but I can't even wear plus size clothing? Why can't anyone just sell in between sizes for once, THERES ENOUGH OF WOMEN MY SIZE ITS FUCKING AVERAGE