The same thing you are. It seems you're taking it to the Nth degree in ascribing a total loss of confidence which is not at all what I'm saying whatsoever.
Was Brady as effective in the second half as he was early in the game? No. That's not conjecture. Nor is it a personal attack on him which you seem to be likewise internalizing. He missed some throws he normally makes. He hurried others.
Great players become so for a lot of reasons. One of which is the ability, perhaps being maybe Brady's greatest strength, to assume a greater and greater percentage of the game pressure through his own play. He masks a lot of other team deficiencies. That said, he also remains human.
Stating that the uncertainty of the new OL, forced upon the team mid-game without time to practice, contributed to his poorer second half by making Brady through those circumstances do things in a manner he wouldn't normally is NOT saying he's completely gone with a case of the "yips". That he simply missed a few throws, rather than completely fall apart is recognition of his higher abilities...not the opposite as you claim.
That said, observation (which is all you have as well because neither of us are in Brady's head) on my part does lead to a situation where some of those misses and miscues were causal by him forced, through a lack of full confidence whether admitted or not, in that revamped on the fly OL in addition to their overall lesser play.
Such lower confidence is not a complete breakdown, simply the difference of a few percentage points in completion and a couple missed scoring opportunities. That doesn't degrade Brady as you seem to think I'm doing, it instead shows more his tremendous abilities succeeding where many or even most other QBs may have completely lost their game.