Obviously Adam and Eve are fictitious tropes from a primitive creation myth that was adapted from parts of the Epic of Gilgamesh.
But setting that fact aside, JW chronology is hopelessly wrong not only because of their erroneous botched interpretation of the neo-Babylonian period but also because of their (Protestant) interpretation that the Israelites ‘going into slavey in Egypt’ started when Isaac was briefly teased by his half-brother, long before there were any Israelites. 🤦♂️ (This apologetic nonsense was adopted because the more ostensible beginning of the period from when Jacob - aka Israel - supposedly went into Egypt contradicts other biblical chronology.)
It can’t be stressed enough that no part of those stories is historical. But if we are to pretend that they are, then based on what the Bible actually says, 6,000 years since Adam’s creation would actually have ended in 1833.