The weirdest thing was that if I threw up 7, it wouldn't make it back to the pocket. If I threw up 8, it went brooklyn.
It sounds like you did have a line, and that line was to hit 7 and throw the ball the same way every time. Now no one is going to hit their mark every shot, but from the sounds of the scores, no one ran away with it either. Do you know what the cut was? I'm betting no more than around even. What would it have taken for you to shoot even? Pick your spares and get a double here or there?
Don't get discouraged by this. It's your first exposure to a more challenging shot and now you know what it's like. The name of the game on a condition like that is accuracy and repetition. I'm not sure how you took the feedback you got with your video, but the crux of what people offered all went to those two things. Those things will make you more accurate and make your shots more repeatable.
I can tell you from expierence that there's no better feeling than making several shots in a row, splitting the same board, throwing the ball the same way and getting a strike on a condition like that.