Simple reality...
Sessions’ total ineptness to do his job would be described as “feckless” and a pawn of the Deep State - the ultimate “insurance policy”.
So, you think his only job was to oversee Mueller’s Russia collusion investigation and since he recused himself from that the man has been sitting in his office on his hands doing absolutely nothing for the past couple of years?
I’d say the farewell he got leaving the DOJ proves otherwise.