In Star Wars canon, the Sith have always stood as the ‘ultimate evil’ in the galaxy, as they tap into the dark side of the Force and have been shown to crave nothing but power through violence and death. The Sith are sadistic, angry Force-wielders, and are often the result of Jedi who have ‘gone bad’. However, that’s just how they’re portrayed most of the time, as the Sith are much more than just ‘evil Jedi’. In fact, one Sith in particular proves Star Wars can push Sith so much further than it does.

https://screenrant.com/star-wars-darth-momin-backstory-origin-sith-op-ed/