Because this is the internet, Vivzie's success with the popularity of Hazbin Hotel has spawned countless droves of idiots who are pure foaming that someone achieved their dream and are bound and determined to ruin it.
Definitely watch first because I'm going into super-spoilery territory now.
The show takes place IN HELL. The entire cast are all demons. Except for Charlie, they had a life on Earth that they fucked up royally, thus they all ended up IN HELL. (Charlie was born a demon) HELL is overpopulated, so they have a ultraviolent Purge every year where they erase all the souls they can. 'They' in this case being other demons. Because