>>91367884Can't talk for an actual brat but specifically for holo my guess would be
Imagine getting into your dream gig all happy and willing only to have your workplace be toxic as all hell, and become disillusioned with the way things go.
Then the job goes down and you manage to land seemingly the same job in another place, only to actually be all the things you actually wanted from your first job, and even more.
Bae probably had one hell of a confidence boost when it finally dawned to her that hololive do really was that good for her, just like pic rel did