What Metallica have done since about 1992 almost negates their previous work, that is, since 1992, they're shit and I could only name about 2 songs that I actually like.
In "Some kind of monster" there is this scene where Dave Mustaine almost cries out to Lars Ullrich: "Do you know how I have felt always being behind?". "Seeing you guys doing everything right and selling millions of records while everything I do goes wrong".
If you haven't seen the movie it's worthwhile seeing for just that one particular scene. I always thought of Dave Mustaine as a true jackass but what he said here really made me get a better view of people.