After the series 4 finale The Final Problem aired, fans were disappointed by the unprecedented number of plot holes and loose ends left unexplained.
Many LBGT fans who hoped for a canon relationship between John and Sherlock were especially upset by the finale.
They believe that the BBC and the writers "queerbaited" them by hinting at a future relationship without having the courage to deliver.
To protest queerbaiting in the show, they took to Twitter with the hashtags #norbury and #bbcqueerbait.
Many scenes in prior episodes did not make much sense without viewing Sherlock as a gay man in love with John.
Dedicated Sherlock fans, many LGBT+, had found enough evidence for a future relationship between John and Sherlock that, in 2016 alone, a YouTube channel called TJLC Explained managed to create over 48 videos explaining the prediction in depth.
The BBC's response to complaints about the finale shocked fans with its rude tone and complete denial, which led to renewed anger.
Many LGBT+ fans were especially disappointed that Sherlock writer Mark Gatiss, who is gay and works with LGBT+ charities, did not want to go beyond "flirting with homoeroticism" between the two main characters.
Fans are also upset that many villains, such as Moriarty and Eurus, were clearly coded as queer, since this perpetuates the homophobic idea of gay people as sexual predators.
It appears that Gatiss is blocking Twitter users talking about queerbaiting, and he has not responded to any of the accusations.
Thumbnail image courtesy of Iris Johnson.