Contradiction with James 5:11
While Job 21:3 describes Job venting his frustration and lamentation, James 5:11 highlights Job’s patience and endurance, suggesting a positive and patient aspect of Job's character.
James 5:11: Behold, we count them happy which endure. Ye have heard of the patience of Job, and have seen the end of the Lord; that the Lord is very pitiful, and of tender mercy.
Contradiction with Job 1:22
Job 21:3 is about expressing his complaints whereas Job 1:22 says Job did not sin or charge God with wrong, suggesting he was accepting and not complaining.
Job 1:22: In all this Job sinned not, nor charged God foolishly. [charged...: or, attributed folly to God]
Contradiction with Job 2:10
Job 21:3 is about Job speaking in his anguish, but Job 2:10 describes Job accepting suffering without complaints against God.
Job 2:10: But he said unto her, Thou speakest as one of the foolish women speaketh. What? shall we receive good at the hand of God, and shall we not receive evil? In all this did not Job sin with his lips.