Can't say I ever had this experience in any teams I've coached in football, basketball, baseball, soccer, golf or tennis. After killing the kid with consequences for each pre-determined error and consequence, they figured it out or quit. It's a soap box, but running, sprints and exercise drills for each error does reinforce one's mental capacity to move forward or stop playing.
Here is a novel idea, how about less reps in practice at this point toward D, a few more to the Special Team area and OL. More film study on the issues and then connect it to field? If they are doing this I'd be surprised.