This chapter is not acrostic, unlike the previous chapters; even the structure provided in the previous chapters is gone; it is almost a seres of notes, like scraps of paper with different observations and comments; only at the very end, in v19-22, is there a simple, pathetic, prayer - 'Restore us to yourself O Lord.' Hope is only in God. 'unless you have utterly rejected us' - the hope is still fragile; but there is no-one else to help!
v1: Trusting in God, contrast Jer 44.15-19; many of the people had deliberately chosen idolatry.
v2-3: The land, so precious to the people, for God had given it, was handed over to foreigners.
v4-10: The bare necessities of life wee hard to find, they had a constant struggle for survival.
v11-15: The people all suffered. No one could find a group of people exempt from the pain.
v16: The key to the book, "Woe to us, for we have sinned!" The long, sorry, saga, of decline and defeat is summed up so aptly.
v17-18: The people still believed that their future was tied up with the condition of Mount Zion, and therefore they sorrowed over it. No longer the place of joy and dancing (v15), but desolate, the home of wild animals.
v19-20: The eternity of God; without Him there is no hope. God is in control, in every generation. But why, comes the question, was this generation forgotten?
v21-22: Ultimately, God would show His faithfulness again. Jeremiah knew that the suffering would end, for God had promises still to be fulfilled; and His throne is forever.
Unlike in Habakkuk, where God speaks in the time of crisis, here God is silent. That is part of the lament; we still cry when He is, or seems, to be silent.