I've only ever heard the "this game's community can't take any criticism" line from people who come from different games and pull "this game would be sooooo much better if it were actually good like this other *cough* WoW *cough* MMO I play, why doesn't it do things exactly like they do it's so stuuuupid that it's not like this other MMO"

That's not constructive criticism, that's complaining that it doesn't copy another game. As someone who's played quite a few MMOs over the years, there's definitely a pattern of people coming over from other games and immediately demanding that it change to fit the game they came from. That is where I usually see MMO communities tell people to kick rocks.