You shouldn't. It was revealed later that Morgan Spurlock, the star of the movie, was also secretly drinking himself to death while he was making the documentary. Not to shame an addiction OR defend McDonalds too much here, but being a raging alcoholic and blaming your health problems on hamburgers and french fries on a massive public stage is/was extraordinarily irresponsible.

You should check out "Counter-claims" section of your link, especially the last paragraph: https://en.wikipedia.org/wiki/Super_Size_Me#Counter-claims

FWIW, there is some controversy around the “methodology” and honesty in that film. Not saying you should change your view of McDonald’s, but possibly of that movie.

The maker of that documentary was a massive alcoholic, that's what caused his liver problems, not eating McDonald's.

OK.