There's lots of mythical elements to the Eden story. Would Adam have had a sword, or known what a sword was? How long would it take to name all the animals, especially ones found on other continents?
Virtually every JW book ever published contains the argument that "if only Adam and Eve had passed the test, we would all be perfect". Really? Do you think every single human from then on would be faithful forever? (Even angels didn't all remain on God's side)
Not to mention the timeline, 6000 years? There's so much evidence of humans predating that year by a huge margin.
The reasoning is that the Flood wiped out Eden, but I better not get started on that.