Hordak gave Shadow Weaver a shittalking, lik ehe does to his other mooks, and she didn't take kindly to her first time being a whipping boy.
So she IMMEDIATELY got on the horn to Skeletor and sold Hordak out.
Hordak got booted out of the Horde, Skeletor did a doublecross on Shadow Weaver and got rid of her too, and took command of the Horde. his first order of business was to allow Catra and Mantenna to kill Imp if they wanted, which they spent the whole episode doing
Hordak and Shadow Weaver turned to She-Ra for help, which she did, because Skeletor proved far more competent as Horde Commander than Hordak was.
Skeletor was defeated, and he was about to tell Hordak that the only reason he was able to overthrow him was because Shadow Weaver was an inside-man, but got sent back to Snake Mountain before he could spill the beans, so Shadow Weaver got off scot free and went back to being Hordak's bitch