You're posting won-loss records, I'm talking about consistent play from the QB position. Is anybody going to say Dalton, Romo, Flacco and Kaep have been consistent? Those guys are the poster children of inconsistency for young QBs. It doesn't mean you can't win with them as they learn, it just means you have to be patient and accept their lows and hope it gets better (which for Flacco and Romo it did.)
I'd even go so far as to say Luck was pretty inconsistent his first two years. Granted, he turns it on at the right times and when he's good, he's amazing, but he also forces the ball and makes some head scratching decisions - which is to be expected from a young QB, even one as talented as Luck.