The last section doesn't ask for the tale of how you were denied, got mad and then left, it asks you to explain what qualities you have and how they will help you be a valuable asset. If you're going to come back with the argument "Oh, I don't care, it still answered the question", then you clearly exaggerated what you wrote by not wanting to improve it.
The standard of the question is basically to sell yourself. It's not up for negotiation.
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