I happened to see about a half hour of “King Richard and the Crusaders”, which is on a number of worst-movies lists. It wasn’t that bad, for the most part played tongue in cheek. There are *so many* movies that are really lousy, that just stink, suck, and {fill in the blank} so much that no one puts them on such lists because they don’t want anyone else to know they actually watched them. :’)
“War! War! That’s all you think of, Dick Plantagenet! You burner! You pillager!”
Of course, the Liz Taylor “Cleopatra” (I think Rex Harrison was in both) is right at the boundary between unsatisfactory and awful, but pulls me back in because of the costuming, sets, and (mostly unintentional) humor.