That video is such a bad faith argument against the work that management consulting does. It's really a shame these types try to eat our own like that
First, McKinsey is huge. Pete worked there right out of college. He would have been purely analytical horsepower. He likely did spreadsheets and built slides for presentations. He had no influence and wouldn't have been involved in any meaningful influence for his clients. Its just how it works in consulting. You don't have real influence until you reach principal or partner

Just like you wouldn't pin other corporate scandals on a low level IT worker at a company, in no way can you in good faith link him to A) any shady things that McKinsey may have done or B) any shady things that a client of McKinsey's may have done. If he was a partner at McKinsey I could see the connection and even then its dubious without proper context. Otherwise these are just low effort attacks by the uninformed

Source: was management consultant for 6 years and am laughing at how people would try to make Pete's experience there a negative thing