https://www.biography.com/writer/john-keats
Keats’ hesitation was warranted. Upon its publication the lengthy poem received a lashing from the more conventional poetry community. One critic called the work, the “imperturbable driveling idiocy of Endymion.” Others found the four-book structure and its general flow hard to follow and confusing.
Recovering Poet
How much of an effect this criticism had on Keats is uncertain, but it is clear that he did take notice of it. But Shelley’s later accounts of how the criticism destroyed the young poet and led to his declining health, however, have been refuted.
Keats in fact, had already moved beyond “Endymion” even before it was published. By the end of 1817, he was reexamining poetry’s role in society. In lengthy letters to friends, Keats outlined his vision of a kind of poetry that drew its beauty from real world human experience rather than some mythical grandeur. ”



