Personally I do agree with him, mostly becuase Nixon was so overbearing that anything Kissinger proposed had to be examined and authorized by Nixon. Like the whole point of Kissinger's office was to allow Nixon to run his own forgien policy. And to their credit they did do detente with the Soviets and went to China ( which is why a lot of Chinese really like Kissinger and Nixon, of which I am also probably subject).
To their detriment of course is that they killed millions of people, but this is also true of literally every other American administration.
I think the main reason that Kissinger sticks in our minds is that he and Nixon explicitly highlighted their forgien policy becuase they were forced to carry out the Great Society at home by the Dem Congress.
that's the big thing. there might be more evil people, but he's the most high profile guy outside of the presidents (and he might be more famous than a couple presidents since he rose to power)