I was at the Monday Night game in 2008. The game was 24-21 at half. In the first 2 possessions pf the second half, AR threw 2 picks which made the score 38-21. Then the offense had a 3 and out followed by a TD by NO making it 45-21. GB scored 8 and NO 7 more, but they game ended on the 3 drives to start the half. Can't really blame the defense in that one.
In 2014, the game was tied at the half, 16-16. GB got the ball to start second half and AR drove them to the NO 5-yard line. AR throws pick #1 of the half, and NO drives the field to take a touchdown lead. Then the Packers unsuccessfully go for it on 4th and 1 in their own territory. Short field and Saints score again. Pick #2 of the half, NO scores, it's a 21-point lead (deficit) and that's the ballgame.
So really, in both blowouts, it was squarely AR's poor play in the second half. He needs to be better.