Here is what I think I am seeing with Jalen.
It looks and feels like he is out there alone. Almost as so he feels like no one on the team thinks he should be or will be the starting QB. So he has a sense of apathy towards even being out there. Basically, he has lost the team belief in him. OL dont block as well, WR dont run as good routes, RBs lose focus on catching the ball out of the backfield. Everyone on the team has in the back of their mind before the play he wont throw and will end up running.
I hate to say this because we need Jalen to be healthy and ready to play. But the Offense has essentially quit on him in terms of belief and effort. Jalen feels that and it has him feeling like he is out there alone. It shows in his demeanor, effort, aggressiveness, confidence. His days are numbered at QB for Bama. This could be his last.