I know from having worked in publishing (and now freelance editing) that breaking through is hard and it often seems like the schlock makes it while the good stuff languishes. But I also know that lesser writers than you have hit the right words at the right moment and made it through. You've got the gift, so don't give up (as if you could ever stop writing anyway, right?). Ejly is right--keep looking for another editor (or agent) who will believe in you and find a way.

I promise to buy your book, full price, from a local independent bookstore, when the day comes. : )