Man, I downloaded Fear and Loathing in Las Vegas. My favourite part is right in the middle of the movie, the bit where they've trashed one hotel suite and they're moving on to the next. 'I recall one night in the place called the Matrix', and Depp turns around and sees old HST sitting there lighting someone's cigarette. Then we zoom in on Lyle Lovett's face as he yells in slow motion that he's giving away LSD to anyone who'll help him cook it. It's dead in the centre of the film, not by accident or because that's what happened in the book, but because that's the kind of director Gilliam is.
So we move from Depp with his sleeve being licked by a Hippy, to an explanation of why the Summer of Love broke and fell. It all comes down to people. He doesn't sound bitter or angry about it, just accepting that the world is too much for him to deal with while straight.