Lars Ulrich is one of the biggest douches in music. Period.
Not wanting to sound like a scratched record, but while I have utmost respect for Metallica, their music & their achievements, the way both James & Lars & even Cliff handled the exit of Mustaine & spoke about him publicly for so long after, was nothing short of callous. They almost reveled in the systematic, public, breaking-down of an old friend. They properly kicked him when he was down.
Neither Lars or James appear to have ever gained any sense of humility over the years.