Jennings played for the Packers for seven years before moving to the Minnesota Vikings during the current off-season, but he has been vocal about his former club since the switch.
The 29-year-old claims that the Packers make their players feel far superior to every other team in the league, a tactic he thinks makes them overlook the quality of the opposition.
"One of the things that drew me to coming over here was the make up of the team. When I came over here, I was kind of brainwashed. There's no 'kind of' to it. Being over in Green Bay, you're brainwashed to think anyone in the division is tiers below," Jennings told radio station KFAN.
"It's like everything that you know in Green Bay is like the best, the best, the best, the best, the best and it's like total brainwashing.
"And I think you don't open your eyes to see what other teams have to offer unless you are in that position, and I was afforded this position."
Jennings scored 53 touchdowns in his 96 matches for the Packers.