Game drives me nuts. I found a good strategy to deal with the huntard and burn mage decks, probably won 80% of my games until rank 11, but suddenly now all I face are ridiculous legendary shaman or druid decks. One druid played on consecutive turns, illidan, ragnaros, leeroy, and cairne.
My deck is a paladin deck with virtually every possible life gain card, plus some pyromancers which combo really well with consecration for clearing the board, and enough weapons to deal with mages who think they can just freeze everything forever. It just falls short when my opponent has stuff like ysera or ragnaros.
Bah. I do have some dust sitting unused, I may be forced to mint a couple legendary cards just to compete. Some, such as ysera and ragnaros, can't be countered in the usual sense. Even if you have a kill card to use immediately after they are cast, the free ysera card or 8 damage is already done and you are behind.