OP, you’re missing the critical point the posters here agree on: no one gets into a US tippy top just for wanting it. And not for coming back and saying, ‘but I really, really want it.’ Nor, “I am EXTREMELY self-motivated and disciplined, however, and have an insane work ethic.” Right now, it appears you don’t have the record the top US colleges need to see. The full record, because these colleges are holistic and every single one of their wants needs to be met.
Nor can you tell these colleges it’s because you want to go to a US med school. (They don’t admit based on career hopes.) Or assume about chances. You’ve given no hint of your grades and rigor, the US standardized test scores. And rather then being top of your extracurriculars, taking on more challenges, having more impact- and possibly more standing in those, beyond your own high school- you dropped ECs.
ECs, btw, are more than just being involved in something or other. Kids are finding opportunities to press further. A typical successful pre-med wannabe will have some experience in the health arena, volunteering, some do research at unis, some have other work in advocacy- rolling up their sleeves and making a difference now, not just planning to someday be a doctor.
It’s not just about hs rank. The “determination” has to show in every part of the Common App and the indvidual school supplements.
And these adcoms are savvy. They know, (because they work with thousands of apps annually,) what kids ARE capable of. And look for the record and the thinking, the drives and how they are being fulfilled.
And then, more.
I’m sorry this is a disappointment. But yes, all grades from 9-12 matter. They don’t look for “success stories” just in grade improvement. They’ll have more than 10k kids applying (who got past ‘first cut’) who never needed to “improve,” have been at the top of their games for 3.5 years of high school, plus all the rest.
It’s THAT difficult. And then, what other posters said about these colleges being a reach for all, even kids who do seem to be perfect.