I don't think you've annoyed anyone, or you shouldn't have done anyway. You've had a set back totally unexpected and your reaction is understandable. Human beings are crap at taking set backs, criticism or rejection, anyone who says their not is a lier, it's how you deal with it that counts. Perhaps internalizing it, instead of having a rant on a forum would have been better, but we all deal with set backs in different ways.
So yes your work that has until now received only positive feedback is suddenly not good enough, it's bound to confuse you.
Life's a game, and sometimes you have to play the game how others want it until you find your own feet and get where you want. This college course is only a short step up to bigger things, get the results you need in anyway and your laughing.
Good luck
And I think what you just said should end this rant lol.
Thanks