That's an understatement. If civilization collapsed today, how many of the things that you have could you make yourself?
https://www.youtube.com/watch?v=XetplHcM7aQ&list=PLf02uWXhaG...
All the choicest real estate of the time is under water now.
30+ genera of North American large animals were wiped out. Horses, camels, hippos, dire wolves, mammoths, mastodons, giant sloths, sabertooths, giant beavers. The whole continent burned. There were extinctions in South America and Africa, too.
Seems to me this could be the root of the Viking legends of Valhalla, the eternal hunting grounds, because at the time it existed it had to be one fucking fertile marshland.
If you want to blame somebody, you have to figure steering a comet in.
Nuclear Event in Ancient India
https://ancient-hebrew.org/ancientman/1054.html ?
edit: But also https://www.jasoncolavito.com/blog/the-radioactive-skeleton-...
Still, the few parts of the Mahabharata (which I've read(english translations of)) seem like Sci-Fi to me.
And then there is https://ge315.org/eze/1/the-celestial-chariot/ , https://en.wikipedia.org/wiki/Merkabah_mysticism , https://en.wikipedia.org/wiki/The_Spaceships_of_Ezekiel and so on.
Then the survivors restarted from almost nothing (building most of the crappy - but suspiciosly similar to very modern architecture - stone based stuff we keep finding), remember, not every person in an advacent civilization knows how to produce advanced technology. i.e. we have TSMC at hand, but I suspect there are other similar examples.