That being said I can also share one of my most toxic episodes to round up this reply, and so nobody has to feel alone in the experience of toxic players. I play FFXIV every week with my buddy since I started playing this game, and for this particular instance we did main-scenario roulette. This was right before Shadowbringers so this was also right before the tank stance changes happened. I played off-tank that time and the other tank should have been main-tank, but for some reason this tank didn't use the main-tank stance. We started to die and it quickly became a shit show with dpses and healers running around all over the place because he did not aggro properly. When my buddy asked why this player didn't use the main-tank stance and offered friendly advice to use it and I told about the aggro ability that this player should be using according to the class (assuming that maybe this player didn't know, and I can't remember the class this player was), this tank bark back at us, told us to shut up and said that he didn't want to use it, because and I quote "It is going to disappear anyways, so there is no reason for me to use them". Both me and my buddy was absolutely flabbergasted and I literally had my jaw dropping. I bursted into laughter because I just couldn't believe what had happened. Up until now I have only met a fraction of stupid people in this game and they were not as bad as this. Not only was the reasoning really bad (just because the mechanics change you still have to use the current paradigm of mechanics in order to hold aggro), but the fact that we got this incredibly hostile reaction for simply giving a friendly advice was just stunningly terrible. Never in my days in this game, have I seen such a spectral of hostility and stupidity. ... There are a few more I could tell, but I think you get my point. I don't let these people ruin my experience of the game, especially when I know the are a sea of good people already within this game, and I currently enjoy this game as a whole regardless of the bad that might exist when it comes the the gameplay etc.

As many already said in this thread, I too strongly think that you should reconsider your un-subing from FFXIV because of these instances. You may yet find some good players to play with, on a daily basis or when you log on, maybe some discord servers or some other place.