This new game plan only scored 16 points against the Chargers, which is not a good defense. 16 points should not really be expected to win games.
While there are some high profile recent QBs struggling along with Mitch, only Baker really has an offense close in talent and coaching consistency. It feels like 2/3s of the Qbs in the league have been from 2016, and he's in the bottom tier in performance, now getting outplayed by Daniel Jones, Gardner Minshew, Kyle Allen, not even just the top guys.