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Mike Roemer/Associated Press

The halftime ceremony for the retirement of Brett Favre's number was the high point for the Green Bay Packers on Thursday night.

Things went downhill quickly from there.

Despite jumping out to an early lead, the Packers fell behind the Chicago Bears in the second quarter and never overtook them again, despite having plenty of opportunities.

But an Eddie Lacy fumble, multiple drops by the wide receivers and an Aaron Rodgers interception that was really the fault of Davante Adams, who stopped short on a route, were among the mistakes that doomed this matchup for Green Bay.

It's hard to ignore the glaring reality that, 12 weeks into the season, there is something wrong at the core of this Packers offense, something that goes beyond player execution. While the Packers' mistakes continue to doom them, coaching and play-calling have also contributed to the poor play this season.

Let's break down five takeaways from this week's game and look ahead to the Week 13 divisional matchup against the Detroit Lions.