These two chapters are pretty clear in what they say. Though it is God’s wrath that has brought on the destruction of Zion (4″11), it is a result of their sin and they know it (13,22). The prophet confesses for the people and then in chapter five. And even thought there is some doubt (5:22) he prays for the restoration that he knows has been promised and proclaims that the Lord will reign forever (5:19) which means his people will reign with him as promised through the prophets.
The contrast between the glory days and the desolation is stark. But the remnant of hope remains as in all the prophets. Because the Lord endures, so will his people.