From Gus Fring to the Salamanca clan, there are a ton of iconic villains in Breaking Bad and its spin-off Better Call Saul. As the saga of a mild-mannered chemistry teacher who “breaks bad” and becomes a ruthless drug lord after being diagnosed with cancer, there are very few characters in the Breaking Bad universe who don’t fit the description of a villain. Walter White began the story as an antihero, seemingly doing bad things for a good reason, but by the end of the series, when it was clear that he was just a power-hungry megalomaniac, he’d become a full-blown villain.
https://screenrant.com/breaking-bad-better-call-saul-villains-best-ranked/