These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Monster-a-Go-Go originally started as a monster movie called Terror at Half-Day, directed by Bill Rebane. However, Rebane was forced to stop production when the film's budget ran out. Terror at Half-Day then remained unfinished for a few years until infamous splatter film director Herschell Gordon Lewis came along and bought the footage from Rebane.
H.G. Lewis needed a film that could be sold as part of a double feature with one of his own films, which was the more profitable move at the time. And so, he decided to "complete" Rebane's movie by directing several scenes that would later make up the second half of Monster-a-Go-Go, adding the pretentious narration, and then hastily piecing it all together.
The resulting film, despite being a terrible mess, was still released to the public. It has since then gained a legacy as being one of the worst movies ever made.