I don't understand the "Lamar chokes in the playoffs" narrative. He's 23 and just finished his second season.
Others QBs who didn't win a playoff game in their first 2 seasons - Troy Aikman, Terry Bradshaw, Brett Favre, John Elway, Dan Fouts, Jim Kelly, Joe Montana, Warren Moon, Ken Stabler, Roger Staubach, Steve Young, Peyton Manning, Drew Brees, Tony Romo, Aaron Rodgers, Matt Ryan. These guys did alright.