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. 
I remember specifically that Iron Tower Studio, the guys making Colony Ship RPG, had to change it to that name from their original title, The New World.
And the Amazon bullshit just flopped and disappeared like a wet fart