Since the SB run.
2009/10 playoffs: Completely gashed by the Cardinal offense. It seemed every Cardinal drive went for a score. In the end an overtime loss and an eye popping 51 points allowed.
2012/13 playoffs: A historically bad defensive game where we were completely obliterated by the 49ers offense. Colin K ran for around 200 yards on his own.
2014/15 playoffs: After playing great D for 55 minutes, the defense inexplicably completely folded up the tent and was manhandled by Seattle, giving up 3 TDs in just minutes to blow a 19-7 lead and a spot in the Super Bowl.
2015/16 playoffs: After decent defense most of the game, the Packers D once again took only plays to immediately give the game away on a quick OT touchdown to once again end the season on a defensive choke.
This is without even mentioning the numerous regular season meltdowns like today, or the inexplicable breakdowns in the 2 minute drill like the ends of the first half today and against Dallas, or just plain unreal plays allowed like the Hail Mary to end the half against the Giants in the 2011/12 playoffs.
I mean yes, obviously the players are failing to execute in these situations, but how many billions of times do they need to 'fail to execute' before we look at the common denominator and realize that the NFL game passed Dom Capers by long ago, and younger, more innovative and adaptive coaches are running circles around him in crunch time?