Obviously I'm not that guy, but I feel like I have to respond
same, but for me the reason is the album, track titles, and interviews from the time all seem to broadcast "the world is doomed, we're tired, and fuck you." That cured me of my fandom like a splash of cold water in the face. I think it's actually their most boring album, message-wise - it beats you over the head with the doom scenario
It's funny that it took up to TH for you to see BOC's message has always been bleak - even parts of TCH, while generally a "happy" album, have wistful, dark overtones.
I wouldn't say that their albums were always sad. I think that it all boils down to balance and good taste (of the band). Music Has The Right To Children does have some sad tracks, but it's not Tomorrow's Harvest sad- it's more about leaving your precious years behind, all your friends and places you've been to for something new. Geogaddi? Well, it's very trippy. It's definitely a screwed up album- but it's not 100% bleak like Tomorrow's Harvest. Oh and you just can't convince me that TCH (EP&LP) are as dark as TH! And then Tomorrow's Harvest comes along, its message completely clear, just like its setting.
And that lack of subtlety makes me feel weird about TH