Many times I came across teachings which stated that Ya’akov Avinu wrestled (struggled) with what could be described as something representative of Esav (I.e. Edom, Adam); of which it is said it was the Yetzer Hara (of which it’s said that it’s equal with Satan and the Malach HaMavet).
So what I would like to know is what’s the common denomitordenominator between all these titles? And secondly why was it that Ya’akov had this struggle; where did it originated from?
After so many struggles why did Ya’akov Avinu had this specific one that leadled to a change in his essence, a change of name? What evil evolved into something he had to overcome?