Actually Korlich and the rest, Mikael has said that 3 songs on BWP deal with the disgust for humanity, most likely The Leper Affinity, The Funeral Portrait and Blackwater Park.
Harvest for example is about being on your death bed. Not much disgust for humanity there. You can't really make out anything like that out of Dirge For November either. As for Bleak, Mikael himself said that he doesn't know what it's about.