Is Kylo Ren's Lightsaber Broken?

We know Kylo Ren has a crack kyber crystal in his lightsaber (as we saw in Star Wars The Force Awakens). Why is this? Does Kylo Sen not know how to construct a proper lightsaber? Or did he base it on an ancient Sith design to be loud and unstable. We'll examine the many different theories floating around in this episode of Star Wars Theory.