There are some rude JP players too.
The 2ch news sites are already writing articles about this.

『FF14』の民度ヤバすぎｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗ
【画像あり】新生FF14の民度がDQキッズ以下だった
etc.

It's just that they are so rare that you won't be finding them often unless you're unlucky.


I, myself, am playing in a JP server too, and my experience thus far is the same as OP, but I'm not sure if it will stay like this when I reach end game content or not.