#21 The Retcon of Gallifrey’s Demise
There were multiple ways in which fans were frustrated by “Day of the Doctor.” In addition to incorporating the War Doctor into the Doctor’s timeline and backstory, it also managed to wreak havoc on some of the new series’ canonical backstories.
Though the Ninth Doctor is said to have annihilated the Time Lords along with their home planet Gallifrey in the reboot’s version of events in order to end the Time War, the episode instead revealed that the Time Lords had been hiding out in a pocket dimension the whole time. New storylines have agitated viewers because of the way they contradict canon, prompting many of them to vent their frustrations publicly on social media.