So what's the best way to get through these stinkers? With help from the genius behind Mystery Science Theater 3000, of course!
The show ran from 1988 to 1999 on Comedy Central and then the SyFy Channel. There were 198 episodes, a feature film, and it won a Peabody Award. Many of the episodes are available on DVD.From Wikipedia:
"The series features a man and his robot sidekicks who are trapped on a space station by an evil scientist and forced to watch a selection of bad movies, initially (but not specifically limited to) science fiction B-movies. To keep sane, the man and his robots provide a running commentary on each film, making fun of its flaws and wisecracking (or "riffing") their way through each reel in the style of a movie-theater peanut gallery. Each film is presented with a superimposition of the man and robots' silhouettes along the bottom of the screen."
This was one of my favorite shows and I was disappointed when it ended. However, Mike and the guys kept going with The Film Crew, Cinematic Titanic, and RiffTrax

On RiffTrax, you can find audio tracks for hundreds of movies, good and bad! Twilight, Avatar, Harry Potter - they're all available. The concept is simple - download the audio track (ranging from free to $2.99) and sync it up with your DVD. (The guys tell you just where to begin.) Adjust the TV and RiffTrax volume, and prepare to laugh!
If you've never checked out RiffTrax or Mystery Science Theater 3000, I urge you to do so. You'll never have to endure a bad movie again!
And I checked - Mega Shark vs. Giant Octopus is available as a fan submission - RiffTrax.Enjoy!