What does mean crisis in literary criticism?

crisis (krīˈsĭs)►
n. A crucial or decisive point or situation; a turning point.
n. An unstable condition, as in political, social, or economic affairs, involving an impending abrupt or decisive change.
n. A sudden change in the course of a disease or fever, toward either improvement or deterioration.
More at Wordnik from The American Heritage® Dictionary of the English Language, 4th Edition

It is hard to imagine anything "crucial or decisive" in literary criticism. With no context given, I would call this hyperbole.

hyperbole (hī-pûrˈbə-lē)►
n. A figure of speech in which exaggeration is used for emphasis or effect, as in I could sleep for a year or This book weighs a ton.
More at Wordnik from The American Heritage® Dictionary of the English Language, 4th Edition