Yes, it's frustrating, but the studying is part of the package for a reason. Good airmanship is not simply time in the airplane. It's also about discipline, good judgment and having a sound factual knowledge base upon which you can draw to make good decisions. Whether its a PPL or upgrading to the left seat of a 747, there's always more studying and learning. The sooner you take that to heart, the better off you'll be.
You'll get back in the air soon enough.
Good luck!