Why are girls self esteem's so low?

I have very many different beliefs on why girls (teenagers) have low self esteem. I even myself was born into the teenage world with a low self esteem but fortunately for me the people in my life let me know how great I am. I think that every teenage girl should have someone in their life that lets them know how amazing they are. It would help boost so many girls opinion of themselves. So why do girls seem to have an automatic low self esteem? Reason number one: Media. Magazines, television, movies, celebrities, etc. All of these things create the ideal woman. A 5'6" size two with gorgeous eyes perfect make up big boobs and amazing at everything every man is "looking" for. That's what girls compare themselves to. No wonder they feel so bad about themselves. Hardly any of those girls exist and if they do they are famous and let me remind you they may be close to that but there's things like photo shop. They aren't even real. Reason number two: the way the world views the role of a woman. In almost every movie and television show, the woman is the sexy sidekick there to well be sexy. That's lovely. So now because the men in the movies treat women a certain way, men in real life treat women a certain way. Because men in real life treat women a certain way, women act a certain way. Well ladies, just so you know, you're NOT a piece of meat. Don't treat yourself that way, and don't let any man treat you that way. Reason number three: morals have become so low they are almost completely gone. In the fifties people were classy. Girls didn't wear skirts above the knee or shirts that plunged to their belly button. Now girls wear skirts and shorts that are shorter than their butt cheeks and they where shirts that are invisible or literally plunge like a freaking clogged toilet. (Sorry I had to say it.) It's sad because parents don't look at their daughters and say, "You are worth so much more than that outfit." Parents don't say "Go change into something I can respect you in." The worst thing is that every girls thought process is "I'll wear this because he will think my legs are sexy." If a guy notices you because of your "sexy legs" you don't want him, because that most likely means he wants the next girl because of her "sexy legs" as well. "Sexy legs" don't make you special to any man. It makes you another girl that puts disgusting thoughts into a boys head. Why has no one explained to those girls that its so much better for a man to have thoughts about you yourself, not getting you into bed. So no it doesn't surprise me that girls have low self confidence. If your one of those girls, I really hope you can understand how much your worth. And if your one of those adults who complains about how "terrible our generation is" maybe you should stop for a second and wait to make sure that you have tried to help a girl realize her worth, because I don't think you understand the pressure that is put on women today to be nothing but sexy. Instead of being the aunt grandparent or parent who complains, be the adult who sets the example and help your niece granddaughter or daughter feel loved and worth something and maybe you'll save a short skirt and a show called sixteen and pregnant. And don't forget to help the boys in your life understand that women are to be treated with respect, whether or not the women treats herself with respect. A real man will ALWAYS treat a lady with respect, if they don't, they  aren't a real man.