OP, if you feel that you are at the bottom now, the only way for you to go is up. My kid has similar profile like yours with high stats and very spiked ECs. He loves making films too, but not anywhere close to what you’ve achieved. He got differed at Harvard, rejected merit at USC, got in Emory with Oxford scholar finalist and Vanderbilt with merit. Maybe Stanford didn’t see a fit for you there? Maybe USC would like you to apply to their film school?
You will do fine at the end and get in most of the schools you applied to. Relax!