Clearly, he's freaking missing a lot of passes, and he's struggling to read defenses and anticipate open receivers.
You'll chalk this up as an excuse because that's what trolls do, but I think his mistrust in players not named Steve Smith, Dennis Pitta, and Mike Wallace has caused him to lock on to certain players on certain players. For a long time, players have failed him. Now, his lack of trust has simply become mistrust. This, I think, is why we see him routinely throw picks in the direction of Pitta.
And obviously, the piss poor offensive line has given Joe pocket paranoia, so he's not stepping into anything.
Not to mention, the run game is terrible, so the back seven can sit on the sticks and wait for the pass.
He needs to get it together and get his mind past his issues, no doubt about it. His technique has been terrible.