See, the issue is that you're conflating the team and the player, which is wildly inaccurate and unfair to do. The overall record is a reflection of the team, not the quarterback, from roster, to coaching, to execution, to game planning, etc. When you stack rank the player against his fellow peers at his position, the numbers aren't great, but he's again not the worst in the league like you want to make him out to be.
But we both know this isn't really about Mac Jones for you in as much as it's really about you wanting the backup to play and feeling he got shafted. So I take it with a grain of salt because of the predisposition you're coming at it with.