My friend works for Cover, and this is just gossip going inside the company, as most of the employees don't really know what is going on with the talents.

Rumor goes that despite Bijou talking like a little inocent girl.
She was coopted by management and was actively trying to thwart any Gura's plan, to the point that Gura didn't feel welcome anymore there in the company.
She went as far to say to Gura that she is way better than Gura at anything, and that she would steal all her viewers sooner or later, as ordered by management.

Don't blame the CEO as Yagoo wasn't aware of anything that was going on.
This was an act of revenge by some managers, as in the past Gura told them to GTFO and dared them to fire her as she was at that point the face of hololive.
Bijou is key here, because they hope she can replace Gura.