It may be best to just leave the subject alone for a while. He's probably smarter than he's acting and has a sense that he needs to train more (it's not always easy to acknowledge advice, but sometimes it's still heard). It's also possible that he's burnt out on training and needs to take a break. Either way, he's going to need to figure it out on his own.

I sure sympathize though- it doesn't sound like a fun situation.