I think the conondrum was Pete felt an immense amount of pressure last year. They bring in Carr, a 10 year vet, and he expects him to be Drew Brees on the field. They expect a field general and so Pete calls plays like he would if Drew was at the helm. Carr aint Drew and Pete took 13 weeks to figure out he needs to be supported by a ground game. Everytime Pete's playcalling put the offense behind the chains, he would call a play where the QB was expected to get all the yards back and convert, just like Drew did in his heyday. He would simply redistribute the pressure he was feeling over to Carr in those situations and Carr wasn't able to bail him or the offense out.
That's it, that's the story.