If his problem really were the new oils as Randy suggested, I think it would be a mistake to just pack it up. It would deny him the opportunity to bowl competitively on those oils, to know how they will transition with several people bowling on them.
In reality, I don't think that's the problem at all and I seriously doubt he doesn't understand how the lanes transition. I don't know what's going on or why he's doing so poorly. It would help if he didn't withdraw from so many tournaments. He's definitely not going to win if he doesn't bowl.
Even if he won one of the next two tournaments, he wouldn't gain an exemption, he's already exempt for next year. He'd have to win the ToC or WC, neither of which is out of the question, in my opinion.
SH