it must be even more painful to play in this type of system.

In other words, it's either just plain too difficult to master with the current offensive staff, or it just doesn't work.

I have a hard time believing that it's a lack of effort or investment on the part of the players. Nearly every starter seems to have a hard time knowing what to do on any given play. Backups are worse. RBs seem completely confused as they take turns.