Archaeologist Israel Finkelstein and Egyptologist Donald Redford have both concluded that this Exodus horseshit was concocted in the the late 7th century and each used different lines of evidence to reach that conclusion. In archaeology, it doesn't get much better than that. Not so much "mythology" as a political tale concocted to give the Judahites a belief that their god would help them defeat the Egyptians as he had done once before.
Of course, it didn't work. The Egyptians deposed the Judahite king and left them easy pickings for the Babylonians who came along after they defeated the Egyptian/Assyrian alliance at Carchemesh.
Of course, it didn't work. The Egyptians deposed the Judahite king and left them easy pickings for the Babylonians who came along after they defeated the Egyptian/Assyrian alliance at Carchemesh.