Just have to turn your run block and the CPU block way up. Then when you gets used to running you can turn it back down. I'm averaging over 4 yards per carry in my CFM. There is a learning curve with the run game. Just practice.
As far as the CPU run game I'm not sure. Most are seeing the CPU run realistic. Just make sure you have all the settings as I do including penalties. Also I test and play games in CFM so if it's play now it might be different