It's an avalanche effect - receivers not getting open leads to Allen holding onto the ball too long and makes him jumpy back there. Stop our run game, and most teams just aren't fearing our pass game at the moment. Where's the deep threat with Palmer and Samuel out? And now Kincaid is likely out for a week or two. Not good.
Regarding the original post, I think, especially given the injuries, the receivers are more to blame than Brady, but Brady needs to try and find an answer. Even on the INT in the endzone, the Bills receiver was completely covered. Josh shouldn't have forced it in there, but given how easily our receivers are being blanketed he needs to try and force some action sometimes. But, the receivers are really bad, and Keon isn't an NFL caliber receiver. He just doesn't have the athleticism from what I see. Beane whiffed there.