There is a general principle regarding roots, sources and their place in existence. The lower something finds itself on the Hishtalshelus hierarchy, the higher its source before Hishtalshelus, that is, in Tohu and the like. For example: someone maybe the the student and another the teacher and although in our experience of things, the teacher is higher ranking, the student’s source is higher which is why the teacher gains more than the student. Another example is when Chassidus peaks about “Bo el Par’oh..Come to Pharaoh…” There G-d tells Moshe Rabbeinu to “come” to Pharaoh as if G-d and Pharaoh are in one place and Moshe needs to come to their level. The obvious question arises when we look at the fact that Pharaoh was most evil of men and the king of the most evil and depraved of lands– what? The answer is that because Pharaoh’s source is above Seder Hishtalshelus, he finds himself lower in in Seder Hishtalshelus itself. The same applies to Esav and the rest of evil– it’s lower here only because its source is higher. So it’s not that evil is lowly, per se, it’s that it’s beyond our ability to deal with it–it’s beynd our reach. See Shviras Hakeilim.