Hey OP, I just want to say that I really feel for you and understand the struggle. I have spent the unquestionable majority of my life in the US, attended an elite US private school, and have been waiting for a green card for more than half of my life, but I am considered an international. It’s incredibly difficult and while I don’t really blame anyone (aside from my family member who slacked on the application), it’s disheartening.
When I was applying for undergraduate admission in high school, I had very extensively researched what top schools look for, what awards/designations they liked etc. and played the game perfectly. Maybe due to less certainty about my goals, I wasn’t as focused this time, and the outcomes likely won’t be as good.
I have hope for you (and me) but regardless, the lesson I have learned is to never let up, and do all you can to distinguish yourself. Adcoms aren’t infalliable, the system isn’t fair, life isn’t fair, but we still can win and write our own destinies. It sucks to always be fighting an uphill battle, but it is what it is.