I have a follow-up head Canon about the movie Evil Dead 2, in that what we are seeing is Ash telling us the story of what happened and how his girlfriend got her head chopped off with a shovel.
That would explain the camp, The Three stooges comedy and the over-the-top bizarre this guy is just so cool he can't be killed even by an army of the Dead even when he sucked into the past like A Connecticut Yankee in King Arthur's Court.
This is held up by the revised ending to army of darkness where he's telling this story to a girl in Kmart sorry, S Mart to impress her as if having a home-built robotic hand wasn't impressive efuckingnough.