What does Jeremiah 29:20 mean?

Yahweh of Armies says: “Behold, I will send on them the sword, the famine, and the pestilence, and will make them like rotten figs that can’t be eaten, they are so bad.

I will pursue after them with the sword, with the famine, and with the pestilence, and will deliver them to be tossed back and forth among all the kingdoms of the earth, to be an object of horror, an astonishment, a hissing, and a reproach among all the nations where I have driven them,

because they have not listened to my words,” says Yahweh, “with which I sent to them my servants the prophets, rising up early and sending them; but you would not hear,” says Yahweh.

Yahweh of Armies, the God of Israel, says concerning Ahab the son of Kolaiah, and concerning Zedekiah the son of Maaseiah, who prophesy a lie to you in my name: “Behold, I will deliver them into the hand of Nebuchadnezzar king of Babylon; and he will kill them before your eyes.

A curse will be taken up about them by all the captives of Judah who are in Babylon, saying, ‘Yahweh make you like Zedekiah and like Ahab, whom the king of Babylon roasted in the fire;’

because they have done foolish things in Israel, and have committed adultery with their neighbors’ wives, and have spoken words in my name falsely, which I didn’t command them. I am he who knows, and am witness,” says Yahweh.