Derek Carr - Why People Dislike Him (IMO)

By definition, a system QB is a QB that can ONLY be successful in a certain system and that's just not true of Brady, Manning , Brees. While certain systems favor certain QB's because it's tailored to their strengths. Calling those QB's system QB's is ridiculous
-Brady tried a new system in Tampa and before the season ended, he went back to what he was doing for 20 years
-Peyton Manning has only played in 1 system his entire career. The Colts went as far as keeping the same OC with a new coach.
-Brees was borderline OK in San Diego. He became a hall of famer playing in a system built totally for and around him.

Feel how you feel but what worked for them worked for them and they didn't deviate from it.