Because the entire player base post on the forums.It's very evident that the real diehard fans that see no wrong post on those forums. I've seen so many cases of someone giving some good constructive critisism on the game only to be told to get the hell off the forums because the game is perfect how it is. Most of them don't even see why people were angry as all sin when the game was first released.
In fact, I have seen so many threads recently on there saying that 2.0 is stupid because it's just going to be like WoW and that the game is fine how it is.
This also happened in Vanguard. It's as if the community gets so jaded that they don't want change, even though the game completely sucks.
EDIT: Just looking at the forums now and I just see heaps of displeased threads about having to pay to play. The reply they get is generally "Good, leave you troll!" which doesn't make sense. It's like the diehard fans want to have an abominally low population (most MMO's go under with more players than FFXIV has right now) which makes no sense. And it's not like these people are trolls, paying a subscription for an MMO that doesn't even have half the functionality as other MMO's that are still in beta is downright robbery, especially when a lot of us paid for the collector's edition last year.