About half of the league’s starting quarterbacks will be 30 or older this season.
Eleven of the top 15 passers by quarterback rating in 2011 will start Week 1 in the NFL in 2016. There’s a reason Matthew Stafford, Derek Carr, and Andrew Luck have taken short, months-long turns as the highest-paid player in the NFL: If you’re under 30 and have a pulse at quarterback, you’re about to be rich.
The rising number of older players at the most important position in sports has led observers like former NFL player and scout and current NFL Network analyst Bucky Brooks to suggest the league is at a crossroads: It’s time for teams to adapt to new methods of finding quarterbacks or suffer through some ugly games and, perhaps, an ugly league.
https://www.theringer.com/nfl/2017/...lem-evaluation-spread-dak-prescott-derek-carr
Another reason for the poor performance of NFL offenses and their QB's is the unnecessary direction the NFL has gone in making not only making it a pass-friendly league despite it's limited number of passers, but the way they have devalued the position of the RB in spite of the plethora of competent athletes in that area.