Job's response didn't help. Job didn't say "You speak falsely." Job's response is basically, "This does not apply to me."
I've finished the first round of speeches, and so far I'm observing that Job's friends are correct in what they actually say in a broad, general sense (as in, they are speaking proverbs and maxims about God and life that usually apply) but the distortions creeps in in what they don't say. They have seen God, but not clearly. They understand part of God, which is very different from understanding all of God. From a Christianity Today article on Job and his friends:
Where then did Job's three friends go wrong? They reduced all evil to "retributive suffering," which is caused by sin and disobedience to God. But there are seven other types of suffering mentioned in the Bible: educational or disciplinary suffering as in Proverbs 3:11 or Hebrews 12:5-6; vicarious suffering, as in the case of our Lord's death on the cross; empathetic suffering, where one person's grief affects many others, as Isaiah 63:9 illustrates; evidential or testimonial suffering, as in the first two chapters of Job; doxological suffering for the glory of God, as in the man born blind in John 9; revelational suffering, as in the case of the prophet Hosea's wife abandoning him; and apocalyptic or eschatological suffering that will come at the end of this age.
While we cannot deny that the issue of suffering in the lives of God's people, such as Job, still contains a good deal of mystery, it is just as much a horrible misconception to declare that suffering is God's normal route for every believer as it is to declare that God's goodness means life will always result in prosperity and riches for those who serve the Lord.