Tampa was 7-9 which is pretty much the definition of mediocre. Your argument is absurd or Tampa would have kept Jameis Winston. .
Calling an offense mediocre, when it ranked 3rd in points and total yards, plus 1st in passing yards, is absurd.
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All that despite 30 interceptions, 41 turnovers and a -13 differential.
Even Jameis Winston was able to lead that stacked offense to top three production. Unfortunately, he also lead the offense to #1 in interceptions, which is why the team finished 7-9, and why the Bucs ditched him.
Think about that. Top three in points and yards, while turning the ball over more than any other team.
Sounds like a dream scenario for any good QB who doesn't throw the ball away almost twice per game.
Hell, even if that QB does throw 3 interceptions in a playoff game, the defense was good enough to bail him out.