Well, moderators contribute to it. I spent a lot of time on post where I tried to use EvE onlines economic model to highlight what I feel can easily be implemented and would improve the game. A post like that obviously (I hope) come from a place of wellmeaning and is intended to help. But when it is treated by moderators with snark and attitude, maybe because the examples I've listed has been posted ten times before and discussed, or the forum moderator is having a bad day or something else.
So I try to contribute and are met with scorn by the people I try to help. I excect stuff like that from the community, but not from any official from the Company. I've seen a lot of it and I think that something that very much drives the negativity often displayed. I think @Cetric de Cornusiac's post above highlights another driver of that negativity. Devs can't really change the userbase, but they can change how they approach that userbase.