He worked hard this week. Yes, it's a big problem that he seemingly hasn't been working hard most of the season, but that's part of the maturation process. I don't know what his persona has to do with anything.
As far as not knowing the playbook, the only possible play you could point to is the one where he went one way and the West went the other. Lynch said on the broadcast that West is the one that fucked up.
Yes, Johnny looked about as bad as he could possibly look, but the O-line played terribly (just as they had been with Hoyer), the defense's inability to stop the run was heavily exposed, and our return teams were terrible. This was an all around dog shit performance.
I really thought fans would be able to understand that Johnny was a rookie and was going to play like one, but
@Randolphkeys nailed it that everyone would jump all over a bad performance.