As bad as the offense has been...the penalties are just killers and it's been a problem for McDermott since he took over.
I like McDermott, but he's got to get the players to play well and play well without the penalties (especially pre-snap which are entirely preventable without "slowing down" the players). He's also struggled with games like this where the team looks like has no idea how to play anymore. Usually they've resulted in blowouts, but this one is against the Dolphins so thankfully it's not out of reach.
I think he's a good coach, but the things he's been bad at don't seem to be improving.