The OT is full of references to “You were a slave in Egypt.”
“I brought you out of the house of bondage in Egypt.”
There are too many references to Egypt to just be a myth.
The myth would certainly have to also include a tale detailing man or collection of men writing the ten commandments..
And that man or men used four of those ten to tell others to love, woship and obey something other than the man/men who came up with those commandments...
Our leaders today and historically disprove that possibility daily...
Only one answer.. and people just don’t like the answer...