I have lurked on and off for awhile. Posted a few times recently, some were negative due to frustrations I had at the moment with the game. Forums in general from my experience aren't on the positive topic side. It is like how if you go to a restaurant and have a good experience you are less likely to leave a review as someone who had a bad one.
Other than trolls posting, I do believe alot of the negative posts are coming from people who love this game and might be worried of the direction after the DT MSQ since we have gotten no feedback from SE. I love the game, i may have posted comments in the past being negative but I want it to get back on track story wise. I would be lying if I didn't admit I am a little concerned the game I play the most might be on it's decline since again, we don't know the direction they will go.

Forums will always be negative but the higher volume of it now I think is because people want the game to course correct since they enjoy the game.