Hundreds of years ago during the black plague, an individual named Howard Phillips Lovecraft started what would lead to the doom of humanity. Although a mediocre writer himself, his works of literature would inspire authors for generations. His most famous work, "The Call of Cthulu", was the first entry into a genre referred to as the cosmic horror story. This promoted the subversive idea that human beings were not loved by an omnipotent god, but were insignificant gnats in a large and uncaring universe, filled with unknowable creatures far beyond our comprehension.
For decades, he believed that these were his ideas, dug up from the dark corners of his imagination. Unbeknownst to him, these creatures that he imagined (nyalathotep, dagon, shub niggurath, etc) were actually real, and had been influencing his thoughts from the beginning. This was in order to gain a foothold in the mortal world, for the more they are known to mortals, the more power they gain, eventually giving them the strength to cross over. Lovecraft eventually went insane and died in obscurity, but various writers after him have picked up his work and added to it, eventually leading to what would be known today as the Lovecraft mythos. This has inspired various forms of media, including games (bloodborne), television, movies, and other works of art that are influenced by the subversive elements of the genre if not mentioning the mythos or the creatures directly, and thereby feeding their power.
A dictator of a small country has realized this truth and sought to end this threat to his people by controlling access to media outlets. These monsters can only cross over in nations that they have been able to successfully subvert, making the effect localized instead of global. While bigger nations like the U.S. will go to hell, this nation will be safe from the beings on the mortal world. By eliminating all knowledge of them and slowly removing their forms of influence in various outlets, they would be prevented from taking hold in a country. Certain outlets would be regulated through a number of measures meant to erase this genre from his country, similar to many dictators of the past. For instance:
Strict monitoring of Internet access. Monitoring search engines and eliminating key words or phrases, shutting down sites like Facebook or Twitter that connect people, limiting network access to certain places instead of in the home.
Book burning and erasure of articles or stories that have cosmic horror influences, as well as executing or imprisoning authors.
Strict censoring of movies, games, and TV programs, pruning them of certain influences and determining what can and cannot be shown.
The point is by selectively removing certain things and restricting access to information, the public will eventually forget what has been lost, closing off their minds from these beings and limiting their power over us.
By restricting access to media completely, I am looking for a way to realistically eliminate these subversive elements in this country in the quickest amount of time possible, and would judge answers based on that. How can I make this feasible?