FFXIV has always had toxic people. Blaming WoW refugees is nothing but a scapegoat. New expansion = more people (just look at the starter citites, they're filled with new players on both new servers and old) = more risk of running into toxic people.

I'm usually very patient with people in lvl 50 content or if it't their first time running a dungeon/trial/raid. But I also expect a lvl 76 BLM to AOE and not try and kill 10 mobs with single target rotation. If I feel like it I give a friendly suggestion, add a smileyface so it doesn't come off as rude, but if you're gonna trashtalk me for that I will kick you. Now I don't expect people do do a "first week savage clear maximum DPS rotation" in a leveling dungeon but i swear sometimes it feels like people just leave skills the way they get added from obtaining them on their hotbar and press random buttons. People have the right to not want to play with those people.