Of course, "fun" is an opinion, but there is a large majority that don't find "following FATE train to kill a FATE boss, rinse repeat" fun.

I've heard people try and defend Eureka by saying that the community, and the stories that are formed from playing in Eureka is what makes it fun for them, and that's fine and dandy, but that doesn't necessarily mean that Eureka is good content.

Eureka IN ITSELF brings nothing new or exciting gameplay wise. It's simply grind X monster to spawn Y boss with less mechanics than a regular dungeon boss. Believe me, I've tried getting into Eureka multiple times, and I just couldn't connect with it, it's just so painfully boring. If I had to compare it to anything it'd be grinding fates in Northern Thanalan, except here there is slightly more "thought" put into it, like which mob to kill next, and which element to attune to (which are both rather brainless endeavors)

In short, people saying "You're playing it wrong" as a counter-argument to why it is boring, just miss the true reason why it's boring. It's not FUN to fight mobs that require little strategy or thought for hours. Nothing more, nothing less. When the Dev Team see people make positive remarks about Eureka because "The community is fun", they take that as "Eureka is fun, and is a successful piece of content", which in turn will lead to more content like this one.

That's not to say it doesn't have positive elements; the zone is beautiful, the sense of danger is real, and exploration is nice. All the core elements to what could've been an amazing experience exist, they've just executed it pretty badly.