what made her pretty good is what usually makes you so cosmic - she is rather ruthlessly but gently driving a wedge between the appalling behaviour that she points out people are guilty of, and the better thing that those people would hope to be if they tried harder..
lazy jokes that pretend that Theresa May REALLY is a greedy heartless monster or that Jeremy Corbyn REALLY is a communist gangster by nature - thus run counter to that and deflect from the fact that it is the system itself which is the prime enemy which to a varying extent compromises and/or corrupts everyone..