The phrase "a monstrous example of" is correct and usable in written English.
It can be used to describe something that is an extreme or exaggerated instance of a particular quality or behavior, often with a negative connotation.
Example: "The recent scandal was a monstrous example of corporate greed that shocked the entire community."
Alternatives: "a glaring instance of" or "an egregious case of".
Whereas the 2012 winner, Into the Silence, had shown a generation of mountaineers haunted in the 1920s by the spectre of the Western Front, The Pike depicted a particularly monstrous example of the statesmen and intellectuals who had begun pushing Europe toward war prior to 1914.
In this great anniversary year of the Ballets Russes, what we find when we look at Diaghilev is a great and sometimes monstrous example of the self-inventor as international guru of art.
The papers are verbose (one Los Angeles Times reporter said his stories were so long even his mother never read to the end of them), formulaic, wretchedly designed (the Washington Post being an especially monstrous example) with the use of pictures being generally of the standard that would have been regarded as slightly old-fashioned in English local papers of the Watergate era.
One monstrous example is his account of a short war with India at Kargil in 1999, when he was merely army chief.
The abstract of the paper, Evolutionary Controversy and a Side of Pasta: The Flying Spaghetti Monster and the Subversive Function of Religious Parody, describes the Flying Spaghetti Monster as "a potent example of how monstrous humor can be used as a popular tool of carnivalesque subversion".
At Mantiques Modern, for example, there is a weird piece of industrial machinery, a monstrous amalgamation of pipes, flanges, cable, mirrors and a finned ball of a head with multiple electric eyes.
A more contemporary example of the monstrous potential of this means of communications took place at Rwanda where, in 1994, the Hutu leaders used the radio to help organize a campaign against the Tutsi minority.
Its national squad has a monstrous imbalance of skills.
