A few years ago all the same people kept meeting each other at sponsorship interviews year after year. When you compared stories, you'd find that airlines often reject people 2-3 years in a row before accepting them. This could be coincidence, a sign that people improve their technique over time, or evidence of the kind of determination and commitment that interviewers look for.
Given that, I would advise you to keep trying, all things being equal.
Your instructors are a good source of information regarding your aptitude!
Best of luck.