Compare Mac to Cam Newton. Cam was throwing to Jakobi Meyers, N'Keal Harry, Damiere Byrd, Gunner Olszewski, Donte Moncrief, Devin Asiasi, Dalton Keene, Ryan Izzo and Julian Edelman for 6 games. You didn't see Cam throwing tantrums like Mac did, you didn't see factions in the locker room wanting Stidham or Hoyer to start like there's been with Zappe. None of that happened because Cam is a leader, while Mac comes across like a privileged rich kid. That doesn't make him a bad guy but being the leader of an nfl team isn't for people like that.
Also Mac had a solid rookie year but it's telling about how his season was viewed nationally when he didn't win offensive rookie of the year. Since 2000 the only qbs to start every week of their rookie season, receive votes for the award and not win it were Baker Mayfield, Jameis Winston and David Carr. None of those guys lasted more than 5 seasons for the team that drafted them.