Yes, this movie is worse than Manos.
At least Manos made you laugh with its stupidity. At least (let's be honest here) it was a tiny little bit charming, deep, deep beneath its layers of bad editing, awful acting and downright dumbness.
This movie isn't. It's very bad and very boring. I had to finish viewing it in a dozen sittings. WITH MST3K.
Manos may be a 'popular' bad movie ever. This may well be the 'real' worst movie ever.