Stuck in My Own Personal Query Hell

Do you ever get that incredible sinking feeling? I've had it all day since I realized that the query I sent to ten potential agents was crap. C-R-A-P *capital period.* My story is pretty interesting, I think. I've got kids from 12-19 that love it, and adults from 30-55 years old that love it and wonder why on earth I am not published yet. No, I don't mean relatives and friends. The problem is clearly my shitty query letter that is boring. How do I know it's boring? Because I posted it on a forum board AND (gods help me) Query Shark, and the vote was unanimous: boring boring boring. Maybe I should feel at least a little special that Janet picked my query to review and didn't really rip me to shreds; just said I don't have any specifics which made it boring. So, on I plod, trying to formulate that shining, radiant query that will make an agent spit their coffee out and shriek "MATSUTAKE!" ....or something to that effect.