My poor, poor little query.

What do you do when the query you’ve been sending out is crap? Rewrite, resend, jump?
I read on an agents blog once, that a mentor of the agent once told her and I shall paraphrase, “the writing of the book will never be better than the query.”
Really? I mean really?
My nine-hundred and ninety-ninth time I have rewritten my query has made it a confusing conglomeration of thoughts I assumed the agent would get.
Oh mercy.
I’ve started over, again. I’ve simplified.
Oh well.