system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek / Lovecraft] Cthulhu awakens in the late 24th Century - How does the Federation deal with this?

This isn't exactly the kind of problem you can fix with an inverted tachyon pulse. Has Starfleet been infiltrated by his cult? What about other civilizations, do the Romulans and Klingons set aside their differences like they did with the Dominion? Would Q or the Bajoran Prophets have any stake in the fight?
gpt
The Federation defeats and contains Cthulhu easily.  He's not a god, merely the high priest of a god, and his madness only truly captures those who personally see him, or are already predisposed to accept him.  He is not nearly as powerful as modern depictions predict him being.  Descriptions of him conquering the earth and shaping it to his will have always come from cultists spreading propaganda.  Every record of him *actually* rising has shown his power to be great, yet underwhelming compared to the expectations.

Cthulhu was fought effectively by the Elder Things who lived in the Oceans during Earth's Prehistory.  The Elder Things, while physically strong, mentally adept, and technologically advanced, were things of mere flesh and bone the same way humans are.  They show that it's possible to oppose Cthulhu and his Star-spawned minions through mere physics.  While the Elder things were not wholly victorious, they were not wholly defeated either; they fought as Equals.

The Federation's understanding of Science is far beyond even that of the Elder Things.  They still relied on Beasts of Burden and personal locomotion, while the Federation has starships, transporters, and phasers.