Re: Am I a terrible drummer?
Without hearing you play I can't comment on how terrible or otherwise you are.
But I'll give you the benefit of the doubt.
But as a high school student, I'll go out on a limb and guess you're "spicing up" the drum parts. In that you should be aiming to play like Ringo when you're playing Beatles songs, the director is spot on.
You don't have to set your kit up the same way, cut your hair the same way or wear a collarless jacket...but you should play as close to Ringo's playing as you possibly can, and avoid the urge to come up with "better" drum parts.
The other thing you might want to consider is having a frank discussion with the director and find out what his gripe really is. Be prepared to talk, and be prepared to listen too.