Script writer Kumagaya Jun tweeted that he was perplexed to see the disc medias of Guilty Crown
sold 10,000 copies. He said, "I'm concerned about it as a writer. Although the animation graphics were great, the scenario was in that
quality." Kumagaya wrote the scripts of Persona 4 The Animation
episodes 4, 6, 7, 11, 13, and 14.
Source: Kumagaya's tweet
Update on February 4th
Kumagaya apologized on his twitter account that he had made offensive and self-centered remarks. He will visit the production companies of Guilty Crown and Persona 4 The Animation to make an official apology.
Source: Kumagaya's twitter account