>>213382504
The final villain of the Star Wars EU is a 100.000 year old omnipotent, clingy goddess called Abeloth who got so corrupted by the dark side she pretty much became a lovecraftian monster and is obsessed with being loved and worshipped by everyone due to abandonment issues she developed after her family abandoned her. After spending months mentally harassing Luke Skywalker in an attempt to seduce him, and the Sith realizing she was a complete nutjob when she blew up their planet's capital due to a psychotic meltdown she had due to being considered ugly and unlovable by the High Sith Lord, she arrived to the conclusion that the only way to get someone to love her and rebuild the family that abandoned her was to wipe out the entire galaxy and rebuild it to her ideal image.
TLDR: the biggest, most powerful villain of Star Wars was a femcel who wanted to commit a school shooting on a galactic scale.