Look at their draft credentials. Penei Sewell 1st round. Frank Ragnow 1st round. Taylor Decker 1st round. Hell even a guy like Graham Glasgow was a 3rd round pick that came from a winning program and the Lions switched to guard from center which was great for his development.
Now look at the Bears draft picks on OL. Darnell Wright 1st round. And then what? I'll throw Tevin Jenkins in there even though he came from the other regime, 2nd round (had back issues in college so he was damaged goods coming in). They took Kiran Amegadjie 3rd round out of a small school in Yale as a project pick (who also had a knee issue in college) and then got lucky with Braxton Jones in the 5th round who is serviceable in a pinch but not a starting tackle in the league and you are asking him to block Caleb's blind side? Hell even a FA signing like Nate Davis was awful who ALSO had red flags in Tennessee. Don't get me started on Coleman Shelton. Basically Lucas Patrick 2.0 (another Poles signing by the way).
This isn't rocket science. Poles neglect of the offensive line to protect your starting QB (and this even goes back to Justin Fields) is an indictment on him. Yet some people here want him to lead the head coaching search and find 4 new offensive lineman? He needs to be gone as well with the McCaskeys.
Should Ben Johnson get 0 credit? Not saying that, but let's not act like he isn't working with a talented OL group who is making his play calling what it is now. He wouldn't be doing alot of these gimmicky plays if the OL was even average.