in the show's defense it was supposed to be a mean Spirited/semi-affectionate Parody of homophobic 1980's horror movies,
but yeah it was Trash, and the Nick Jonas thing wasn't the only homophobic thing in the show, there was also a character literally named "Predatory Lesbian" and she's among one of the characters who gets killed early in the story
Frankly though Scream Queen's creator (the same guy who did Glee and American horror Story) seems incapable of making a show without making it as Homophobic and steteotypical as possible, which considering he IS gay is weird, either he's extremely self depricating or he's like Milo Yappypoodle and hates his own kind
to be fair he did make ONE show that was not deliberately Homophobic or Stereotypical(it still did have a vague air of stereotyping though), a shortlived show called "the New normal" which got cancelled after one season