I mean, Hololive was very obviously isolating her from sponsorships and "official" content and generally treating her like a leper after the Taiwan incident and only started letting her loose after she announced her graduation, so I feel like she had a pretty damn good reason to want out. Giving mod status to her Chinese hatemob was an incompetent enough move on its own to justify her being done with Cover as far as I'm concerned.
She's pretty much spot on in the clip. The only drama she's had in Vshojo is people being eternally butthurt about Vshojo existing and extending it to her.