The author uses these rhetorical questions to express his feelings that Yahweh has forgotten them. These questions can be written as a statement. AT: "It is as though you will forget us forever or not come back to us for a very long time!" (See: [[rc://en/ta/man/translate/figs-rquestion]])
Here "days" represents their lives. AT: "Make our lives good, like they used to be" or "Make us as great as we used to be" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Possible meanings are 1) that the writer is afraid that Yahweh might be too angry to restore them or 2) that he is saying that Yahweh is too angry to restore them.
This speaks of Yahweh being very angry as if his anger cannot be measured. This is an exaggeration. AT: "are extremely angry with us" (See: [[rc://en/ta/man/translate/figs-hypo]])