While its easy to be angry about this loss and say "Mitch sucks" that really is not supported by facts.
He finished the season 21st out of 39 qualifying QBs (1000 passing yards+) with a 93.5 QBR.
That was better than Matt Ryan, Teddy Bridgewater or Jared Goff. Mitch grades out around the 47th percentile of total QBs in the league that saw significant action.
It is really tough to go deep in the playoffs without a top 5 or 6 QB unless you have a great defense. Roethlisberger is sitting at a 94.1 QBR, less than a point higher than Mitch, but sporting a top 3 defense. Completely different story.
Downvote all you want. Stats are stats. Mitch isn't horrible, and he isn't the reason we lost the game. Rodgers putting up a 147.9 QBR on our defense is why we lost. We could never complete in a shootout with GB, our defense had to make plays and they did not.