The toxicity starting to happen.

[Shalan]

And how is it toxicity to not want to watch a video or read a guide? Read the normal guide for the game, yeah. But to have to go through diagrams, others play styles, and videos just to have fun and play a game? That's not your call to make. That's not anyone's call to make. An MMO is not locked to only one playstyle that has to be super effecient or the people playing aren't 'doing it right'. It's an MMORPG "RPG" Role Playing Game. Taking on a role. Playing that role how you see fit.

It's toxic because people apply that same attitude about how they don't have to play optimally to even the basic functions of their class.
Curebotting healers
Non-mitigating tanks
BLMs not using Enochian
Ice/Thunder Mages
Freestyle Sam
Non-positional Monks

The list goes on. And if you try to call it out people will rush to their defense and shout, "It's just a game! Let them play how they want to play! Don't try to tell them to do the most basic, simple rotation their class is expected to do!" Even if you try to be courteous and respectful in your request for better play people will still snap and hound you for it.

But for some reason, that's not viewed as being toxic, even though it's having a detrimental effect on the players grouped up with them.

Frankly it's insulting to those players as well. Imagine someone telling you that it's okay that you're playing worse than the trusts/NPCs in the game play. That their expectations of you are so low.