I’m sorry that you have been discriminated against and bullied for your stature. That sucks. That said, you have the foundation for a pretty amazing essay. We all learn and grow from adversity. The one theme I see in your post is perseverance. It’s not like you tried one thing, and gave up. You kept working at it!
I will caution you though that it’s tough getting $ from US schools as an international student. Especially from the top schools. It’s hard for domestic students as well! The admissions cycles in the US get more and more competitive every year. Even valedictorians with seemingly “perfect” applications are denied regularly from the top schools. Be sure you have good match and safety schools in your mix. Honestly focus on those and then just apply to a few “reaches”.
Good luck to you!