Jamieson, Fausset and Brown on Malachi 1:3

3. hated--not positively, but relatively; that is, did not choose him out to be the object of gratuitous favor, as I did Jacob (compare Lu 14:26, with Mt 10:37; Ge 29:30, 31; De 21:15, 16).

laid his mountains ... waste--that is, his territory which was generally mountainous. Israel was, it is true, punished by the Chaldeans, but Edom has been utterly destroyed; namely, either by Nebuchadnezzar [Rosenmuller], or by the neighboring peoples, Egypt, Ammon, and Moab [Josephus, Antiquities, 10.9,7; Maurer], (Jr 49:18).

dragons--jackals [Moore] (compare Is 34:13). Maurer translates, "Abodes of the wilderness," from an Arabic root "to stop," or "to abide." English Version is better.