The top 50 or so of that list is an absolute joke. There are many problems in there, but to put Batman: The Dark Knight as the 15th best movie ever is laughable, as is putting Back to the Future at 23(Die Hard at 29?!).
But rather than focusing on the multitude of overrated films, I'll just mention a few that are criminally underrated(as in deserving of spots at least 100 higher than they are listed):
In the 400s, Princess Mononoke, The Deer Hunter, and Do the Right Thing lept off the page at me as deserving considerably higher.
In the 300s, Casino, Rocky, All About Eve, and even Airplane should be given considerably better marks.
In the 200s, Ran, Das Boot, and The Philadelphia Story are all far too low.
In the 100s, Paths of Glory, The Searchers, and Bridge Over the River Kwai are all way too low(I'd argue that Amadeus is underrated too, but not 100+ spots underrated as it sits at 136).
That's just my first thoughts running down the list. Perhaps I'll have more thoughts if I look at it some more. But some of the inclusions are just... stunning(apparently Ron Burgandy really was legendary).