God = Elohim. They had lost sight of the covenant God, Jehovah.
Wherefore... ? Figure of speech Erotesis. App-6.
our soul. we. Hebrew. nephesh. App-13.
Related Commentaries of Numbers 21:5
Numbers 21:5
5 And the people spake against God, and against Moses, Wherefore have ye brought us up out of Egypt to die in the wilderness? for there is no bread, neither is there any water; and our soul loatheth this light bread.