This concept of the breaking of the vessels of light supposes that God made a mistake. He didn't want the vessels to break, but they broke anyway. And now it is up to human beings to pick up all the pieces and restore them (to knit up the unraveled hem of the universe, as it were). Of course Kabbalists would deny that the shattering of the vessels implies an error by God:

The shattering of the sefirot of Tohu is not a coincidence, nor does it signify a flaw in the creative process. On the contrary, it serves a very specific and important purpose, which is to bring about a state of separation or partition of the light into distinct qualities and attributes, and thereby introduce diversity and multiplicity into creation,

The Kabbalah is essentially Gnostic doctrine. It's based on the teachings of the Hermetic books, the Gnostic texts, Platonism, and neo-Platonism. The Gnostics did very much believe that the god who created our world was flawed, and that he made mistakes. Gnostics also believed that man was higher than the god of this world, because man possesses a spark of the true divine fire, but the god who created our world does not contain this spark. This is why the god of this world is envious of mankind, and tried to prevent man from gaining a knowledge (gnosis) of his own innate divinity.

aka - destroying gods creation & supergluing a jewish version together. It's satanic & evil @ the core