I'm assuming you haven't watched Stafford much? 68%, 1,378 yards, 7.6 avg, 10 td's 4 int's, 99.6 QB rating this season. All that with no running game and Marvin Jones as his only weapon on offense. We can even look at last season: 67.2%, 4,262 yards, 7.2 avg, 34 td's 13 int's, 97 QB rating. Numbers that Joe has never come close to putting up.
Joe hasn't led us to the playoffs in soon to be 3 of the last 4 years. He has a 26-27 record since becoming the highest paid player (at the time). With his contract Joe should be carrying this team and elevating the players around him. He's not doing that.