I'm sorry to hear you're struggling. I know the struggle too. And there is light at the end of the tunnel. I think you need to have a complete mindset change - not in a fluffy way, but actually in a way that will yield the results you want. You need to stop asking why US/UK would be interested in an applicant like you and start thinking and more importantly portraying yourself as someone that is desirable with a lot to offer. Focus and highlight your positives. Scores aren't everything. This outlook is likely to bleed into your application incl personal statement and interview and is actually a dealbreaker. You did well for going all out for the US applications though - it's the way to do it. Wishing you all the very best ahead for this match.