Usually, people can voice what they think about something they did not like. They can do so and state why they did not like it. For those cases, that phrase may not apply.If you don't like the program, change the channel. I say this with much sincerity.
But in this specific case, where the one commenting is just mocking the work, not really adding anything interesting while doing so, either, I'd say it applies completely.
If we don't like something, we can say so. But to start with "most dumbest story ever" does not really indicate an intelligent discussion of the merits of the story will follow.