He has had limited success but a long time ago on offense. He has been bad for a very long time as a head coach managing the offense.
Even before the Rams he has been bad. There was a sprinkle of success in some seasons, but overall bad and trending downwards before rock bottom last year.
The NFL is so good at identifying tendencies and all the teams know exactly what is coming.
Given all of that, I actually thought there were some good things last week compared to week 1 and part of the game plan was to let the defense win the game. Hence I gave them a B- grade, but combine that with the F from week 1, the offense is sitting at a D+ for the season.