Contradiction with Genesis 1:31
Describes creation as "very good," whereas Ecclesiastes 2:6 implies a sense of dissatisfaction with human efforts.
Genesis 1:31: And God saw every thing that he had made, and, behold, [it was] very good. And the evening and the morning were the sixth day. [And the evening...: Heb. And the evening was, and the morning was etc.]
Contradiction with Isaiah 55:9
Highlights God’s thoughts and ways as higher than human’s, contradicting the earthly pursuits in Ecclesiastes 2:6.
Isaiah 55:9: For [as] the heavens are higher than the earth, so are my ways higher than your ways, and my thoughts than your thoughts.
Contradiction with Matthew 6:19-20
Advises against storing earthly treasures, opposing the material accomplishments in Ecclesiastes 2:6.
Matthew 6:19-20: Lay not up for yourselves treasures upon earth, where moth and rust doth corrupt, and where thieves break through and steal:
Contradiction with Luke 12:15
Warns that life isn’t about material abundance, contradicting the focus on accomplishments in Ecclesiastes 2:6.
Luke 12:15: And he said unto them, Take heed, and beware of covetousness: for a man's life consisteth not in the abundance of the things which he possesseth.