Looking for tips from better frost dk's

so if i queue a SS and im at 2178 and i see SP Feral BM Hpal Rdruid. How do i just not lose every single game? like the feral is just running down the healer 100-0ing it the bm hunter is killing me through 60% DR and Bark. and the SP is just juicing these gorillas into the stratosphere in damage. Just curious what im supposed to do to win.
P.S. I lost 40 rating after rdruid left game
P.P.S hunter is doing more damage than the us did to japan.

When you figure it out let the rest of us know.

but im asking for help :frowning: