For me, the crazy thing is that God's long speech to Job makes it seem like the reason for Job's suffering is a cosmic mystery, whereas we, the readers, know something Job doesn't: that the suffering is due to a petty bet between God and Satan, based on God's boasting about Job's piety (1:8). That's pure bathos, the implied belittlement of God's pretensions.

Jack Miles points out that "Unnoticed is the fact that from the end of the Book of Job to the end of the Tanakh, God never speaks again. His speech from the whirlwind is, in effect, his last will and testament. Job has reduced the Lord to silence."