One think I did appreciate about McKinsey is how they will advise anyone. Left-wing dictators, right-wing dictators, normal governments, big tech small tech, banks, you name it.

There is something freeing with "it's just money"... you don't question their political loyalties or how they are affiliated - they don't care, they just want cash.

Unfortunately actually working with them made me realize they are kind of useless and their main value is that they can produce a lot of powerpoint presentations, and eat an infinite amount of money per slide.

In my opinion/experience they are not evil, they are just useless. But YMMV