What In The High School Environment Gives Girls Bad Self Esteem?

All the things you mentioned and a lack of support in their life maybe a absent father, negligent mother, or friends that are toxic and break them down instead of building them up. I think that’s more of a factor than material goods and physical attributes. I mean you might admire a movie star or musician but their lifestyle most likely doesn’t appeal to you because chances are you have people in your life that value you, thereby boosting your self esteem. Wow that was a long sentence hope I helped!

Nothing about high school, everything about puberty.
Girls (and many boys) would have the same experience in grade school if puberty hit at 9 instead of 13 or 14. The physical and psychological changes that take place (girls don’t NEED boys before puberty hits, they do after) make girls more susceptible to influence, since their loss of confidence is directly tied to their ability to exist outside of someone else’s approval. Even attractive girls have enourmous pressure put on them to ‘maintain success’, which may or may not be tied to anything within their power (we are born looking the way we will look) and so impossible contradictions and emotions flood and overwhelm many girls, creating the self-esteem ‘trap’ that so many people worry about.
You can’t spend 14 years of your life thinking that boys are the equivalent of walking toads and spiders and then try to wonder ‘does so and so like me’ without going through some transformation and self-esteem issues. The rule book changes at puberty and continues from there.

In any environment comparing yourself with others is hard to do without feeling bad. It is the competition that makes you suffer. Stop feeling less than them and start doing more of your own thing. Less suffering is more attractive by far. People can see when you’re envious. It’s written on your face.
Esteem comes from accomplishment. Do something that you are proud of and it doesn’t even mean that you have to change the world. Just do small things that you are proud of and it will add up before you know it.

I think more expensive stuff..and like maybe mean insults that other people make about them. Umm.. seeing that somebody is better looking/richer/happier than them..idk