I am so DONE with fast plays and I never figure out what actually killed me. How did a Priest class with no cards in their library kill someone with 39 health or how did a shaman do 10 damage to all my monsters and me!? I never find out why, I try to friend players judt to ask and I get nothing!
You can use a deck tracker from sites like HSReplay. This way your games are recorded and you can rewatch them later.