What's the point with that quite lackluster story in Endwalker?

[CrownySuccubus]

As I've said in the past, the Ea was the point where I mentally checked out in the story. A group of nearly omnipotent, all-wise aliens claim to have solved every problem they can conceive of on their planet, but become suicidally depressed because they learn that the heat death of the universe is inevitable? They all aggressively sought to end their lives because in, like, a hundred billion years or whatever, the universe will end? Are you kidding me?

And to make it even worse, let me just say two words:

Time. Travel.

We have established that it is possible to travel back in time and (based on the existence of the Crystal Exarch) stay there basically permanently. That is achievable via technology that is available on present-day Etheirys, plus another 200 years after the planet has been reduced back to the stone ages. This proves that there still were/are challenges for the Ea to learn and overcome -- even if they can't stop the end of the universe, they can literally go to another universe ad infinitum.

The Plenty is just as stupid. "We've eliminated all problems, and we couldn't remember why after a bird asked us some questions. Therefore, we all can't wait to die."

This is just....grade school-level bad writing.