The 14 point swing was the difference in the game early in the 1st half. The Bears missed on 7 points after a PI call that gave them a fresh set of downs at the 1 yard line, and then the blunder at the end of the half where they finished with 0 points.
It goes back to what I said after game 1. The offense has to play almost flawless football to win some of these games, especially against real offenses with elite QB's. This is the worst offense the Packers have had in years but the Bears defense still couldn't get off the field. It's not fair to ask of this offense to score on every possession, but that's pretty much the way it's going to be against the better QB's.