What does Jeremiah 2:6 mean?

They never asked, 'Where is the Lord who brought us out of Egypt, who led us through the desert, through a land of wastelands and pits, a land of drought and darkness, where no one travels or lives?' Jeremiah 2:6 - Modern Text Bible

(God points out that his people forgot how he rescued and cared for them in the hardest places, never even asking where he was.)