Women are just as shallow. What you're experiencing also applies to guys too. A lot of men get body shaming as well. Do you see all the male models in the media? Tall, dark and handsome with perfect muscles. Most women are drawn to that and find that appealing, I mean who wouldn't? Thats basically the ideal man. But if you were to make a poll, you would get different votes from men that like women of all sizes. I have seen polls and there are several polls for men which include tall, dark, handsome with perfect muscles. Guess what? Basically majority or 90% of the votes were for tall, dark, handsome. Any woman and even a man himself can agree that being tall and big is the most attractive, but there are men and women that can agree that woman are attractive of all heights and weights. You don't have this societal pressure to be big and tall like men do to be seen as universally attractive among most women. I'm short and skinny, basically the opposite of tall and muscular. I don't believe any woman would really like my body type and height, but thats just the sad reality of it.
A tall and muscular guy looks better than me physically in every way, but idc cause not every guy is the same and we're all different. There will be people that have it the best in appearance, you just gotta work with what you have. Focus on what you can control. If you have acne then do acne treatment theres tons of them. If you want to lose or gain weight then its possible. Being a woman, your body really isn't as much of a negative impact as you may think. Some guys might not like your type, but there'll be some that will, that goes for anyone. Society is much less harsh on a woman's body than men are. Trust me, as a skinny guy it sucks hearing a lot of woman like big guys and not skinny guys even. The pressure of being a big guy is worse than being a big woman because society tells us we need to be big to look "manly" and attractive. Its harder for guys, trust me.