Supernatural was an incredibly popular show from The CW, but the spin-off, The Winchesters, only managed to get through one season before the show was unceremoniously canceled. Considering the remarkable success of Supernatural from 2005 to 2020, with 15 seasons of a show that only came to an end because the stars decided it was time to move on, it’s hard to imagine that the property would struggle to find life after the original series. However, that’s exactly what happened.

https://screenrant.com/supernatural-winchesters-spinoff-canceled-reason/