If we’re looking at the real villains of Cobra Kai, Season 3 showed that it was adults like Daniel, Johnny, and Kreese who unintentionally or intentionally manipulated teens in an attempt to settle old feuds.
And while Samantha LaRusso is a source of some major drama in the Cobra Kai series, she’s not the sole source.
Also, it takes two to tango in these romances, so anyone mad at her should also be mad at Robby and Miguel.