I had one like that, but managed to get promoted to equal standing so she’s no longer a direct threat. After nearly a decade of subtler sabotage, the company was sold to a competing firm when my boss retired, and one of their admins who had worked with her bad-mouthed her to hell and back but sang my praises. They had to keep her to do the shitty overcomplicated stuff nobody else wants to learn how to do, but at least now I don’t have to talk to her and I’m doing okay at the new place.