Jamieson, Fausset and Brown on Habakkuk 2:5

5. Yea also, because--additional reason why the Jews may look for God punishing their Chaldean foe, namely, because ... he is

a proud man--rather, this clause continues the reason for the Jews expecting the punishment of the Chaldeans, "because he transgresseth by wine (a besetting sin of Babylon, compare Da 5:1-31, and Curtius [5.1]), being a proud man." Love of wine often begets a proud contempt of divine things, as in Belshazzar's case, which was the immediate cause of the fall of Babylon (Da 5:2-4, 30; compare Pr 20:1; 30:9; 31:5).

enlargeth his desire as hell--the grave, or the unseen world, which is "never full" (Pr 27:20; 30:16; Is 5:14). The Chaldeans under Nebuchadnezzar were filled with an insatiable desire of conquest. Another reason for their punishment.