Super-thin is never pretty no matter what the trade magazines say. Personally I don't like women that look half-starved.Society has rather unrealistic gender standards, at times. If I still tried to adhere to society's warped standards of beauty and such as a woman that I didn't even ask for then I would still hate myself for not being good enough for it. Now I focus on my own sense of beauty and self-esteem. For me. I don't care that I don't look like a model, I can choose to dress how I want to, I don't have to be super thin to be pretty, I don't have to wear makeup everyday, my capabilities and intelligence is also important, etc.
Maybe I actually can get why someone has a disconnect with their own gender. Society has already told them they don't fit in, but expects them to fit into a box anyway. You get bullied in school for being a little different and adults aren't even that much better later on. I have struggled with bulimia nervosa and know other women who have, I know a girl who almost died from it and her friend who did lose her life. A lot of people have had an eating disorder at some point in their lives, around 20 million women and 10 million men in the US. https://www.nationaleatingdisorders.org/get-facts-eating-disorders
I think society shouldn't expect everyone to fit perfectly into gender boxes. People are individuals. Stop telling young girls and young boys something is always wrong with them. Not pretty enough, not feminine enough, not a bodybuilder, too emotional, not emotional enough, not masculine enough, etc. Like the messages in media often say and are frequently internalized by people. There are masculine women and feminine men too and they shouldn't be shamed for being so either.