Contradiction with Proverbs 20:29
Job 30:2 speaks of the lack of usefulness of the strength of youth, whereas Proverbs 20:29 states that the glory of young men is their strength.
Proverbs 20:29: The glory of young men [is] their strength: and the beauty of old men [is] the gray head.
Contradiction with Ecclesiastes 12:1
Job 30:2 portrays a lack of vigor in the elderly, whereas Ecclesiastes 12:1 encourages remembering the creator in youth before the days of trouble come, implying the value of strength in youth.
Ecclesiastes 12:1: Remember now thy Creator in the days of thy youth, while the evil days come not, nor the years draw nigh, when thou shalt say, I have no pleasure in them;
Contradiction with 1 John 2:14
Job 30:2 emphasizes the weakness in old age, while 1 John 2:14 acknowledges the strength of young men.
1 John 2:14: I have written unto you, fathers, because ye have known him [that is] from the beginning. I have written unto you, young men, because ye are strong, and the word of God abideth in you, and ye have overcome the wicked one.
Contradiction with Proverbs 31:17
Job 30:2 discusses weakness, whereas Proverbs 31:17 talks about girding oneself with strength.
Proverbs 31:17: She girdeth her loins with strength, and strengtheneth her arms.
Contradiction with Isaiah 40:30-31
Job 30:2 indicates frailty, while Isaiah 40:30-31 speaks of renewing strength and not growing weary.
Isaiah 40:30-31: Even the youths shall faint and be weary, and the young men shall utterly fall: