First and foremost, a lateral like that will almost always retain possession. Onside kicks are a random crap shoot.
Secondly, last week he relied on the defense to get a quick 3 & Out in order to give the offense one more possession. He didn't play aggressive, he punted on a short 4th down after failing to convert on 3rd down when he probably should have used a timeout leading up to the 3rd down play.
This week he gets aggressive and decides to risk a short field. Had he kicked it deep, the defense would have stopped the Bucs because the Bucs were basically stopping themselves. Dallas gets the ball at around midfield and they have plenty of time to execute a 2-minute drill properly.
He's fucking lost.
Meh, given the offense we were facing today, I'm not wringing my hands over it.
I agree with pretty much everything else you've said though. It's just like 2 years ago when JG lost a couple of games for refusing to run, then goes into Washington and then runs it like crazy, even though it wasn't working, and we end up losing anyways.
The dude has no philosophy other than Don Coryell, pass, pass, run, pass.