haven't seen this movie, how bad is it anyway?

So bad I couldn't even sit through the MST3K version of it. They were grasping at straws when it came to jokes because there isn't even enough in the movie to make fun of!

Horrible from the opening folksy theme song with lyrics like "Sashay through the sarcasm" to the ending scene where the woman stumbled into the sea to be the mate of the laughable Gumby-esque 'walking cat fish' monster that the depressed German lunatic of a doctor turned into. As Mike put it: "It's ending like an Italian neo-realist movie from the sixties!" And Tom Servo quipped: "It was the winner of the Cannes Palm D'Uh award!" it's senseless, the plot is extremely lame, the characters mostly repulsive(except for the poor black guy everybody talked down to wven though he was supposed to be scientist), and the costumes so laughable that they are jaw-dropping. Maybe cleaned up it is actually watchable, but the yellowish grainy film I saw on MST3K was just awful. That did not help me to get through the film...although nothing did, really.