I just got back from watching King Arthur.
I went through a phase where I read a lot about King Arthur and the search for the facts behind the myth. I also read all of “la Morte de Arthur” and “The Quest for the Holy Grail” where are both difficult reads.
This movie had nothing to do with either the legend of Arthur or even some of the supposed truth that might have spawned the legends. In fact, if you had changed the names of the characters in the movie, there is no way you would realize that the movie had anything to do with King Arthur.
Leave it to Jerry Bruckheimer.