It's an alternate world. We're not self inserts. Instead of demigods, our Father and Mother are deities, usually from Another Pantheon, this is not cheating, but selective eugenics from the gods, to ensure that the universe is protected from the Xenomorphic Gods of the Outer Void. The Great Old Ones and the like are similar creatures to our enemies. The year is 2057 and thus technology is superior to present days that we live in. As our parents grow weaker through some kind of divine atrophy, we will become the only line of defense against The Lovecraftian like gods that threaten all existence.

*The Cthulhu Mythos it'self is not what I mean by Great Old Ones and Outer Gods. The Lovecraftian enemies of ours are alien gods completely separate from the like minded Outer Gods and Great Old Ones.