Contradiction with Jeremiah 32:27
God declares that nothing is too hard for Him, contradicting the implication in 2 Kings 18:33 that the God of Israel could not deliver from the Assyrian kings.
Jeremiah 32:27: Behold, I [am] the LORD, the God of all flesh: is there any thing too hard for me?
Contradiction with Isaiah 37:35-36
God Himself defends Jerusalem and overcomes the Assyrians, showing His power to save, contrary to the suggestion in 2 Kings 18:33.
Isaiah 37:35-36: For I will defend this city to save it for mine own sake, and for my servant David's sake.