Got it. I think you are still young enough to apply. Maybe you just need to get together a good support team. My undergrad is a good one, but honestly, because I didnt apply straight out of undergrad, I didnt use them at all. Inf fact, they took forever to provide me with a committee letter and caused me to become complete very late in the cycle. I know what you mean. But I was able to have friends review and seek support from mentors at work. Obviously, easier said than done.
I wish I could help review your application and see what things need to be improved or more focused. I hate seeing people drop their dreams of becoming a doc. Especially us on this URM thread, because the US really needs more physicians like us.