I think this is the nature of baseball game threads, especially once a franchise has had some success and the fans, with the taste of winning in their mouth, begin to hate losing.
On the White Sox forum I post on, you can tell how the team did by the size of the gameday thread. If the Sox won 12-0, the game thread contains a few dozen posts. If the Sox lost, the game thread contains hundreds of posts. When MLB.com isn't loading on my smartphone and I want to know how the team is doing, I literally go there to check the size of the game thread and it's usually pretty accurate.