Have I taken a census of the entire playerbase to get a % of opinion? No. If you want pure numbers you already know you won't get it. But considering I have WoW players telling me regularly how much nicer ff players are, my own lovely experience when I was new, my own efforts towards new players, new players telling me their experiences etc etc
It is not so hard to think ff overall has a nicer community. Even this forum. It's toxic posters are nothing compared to others I have been on. Even a casual game of League of Legends is worse.