The sheer fucking hubris of it all. The unexamined and unjustified hype wave. The "influencers" peddling the damn thing with naked cynicism. The recycled maps that often just took the same assets and tilted them sideways. The laughably bad QA allowing almost anything to be put in the chat box.
The way it just... stopped being relevant.
That is all. 
you could make yourself invincible by wiggling the window around
because almost everything was client-side
IN AN MMO
Reject mortality. Return to forever rolling macro.