I don't think Yuri was done dirty here. The exact opposite - as far as non-amicable graduations go, Yuri's was arguably handled the best of any vtuber. She got to record a goodbye message for the fanbase (a clever way to give some closure to fans without risking the talent going rogue while on-stream), and the only thing said about her termination by Sakana was that it was a contract dispute and that Yuri had rights as a former employee to privacy as to what occurred. There was no attempt by Phase to poison the well in case Yuri wanted to try applying to another corpo. None of the other talents, as far as I can tell, feel like her leaving was unjust or unfair, so Sakana must have been extremely reasonable with his contract negotiations, or, as the rrats of the time speculated, Yuri had some serious problems she did not want to negotiate for in her new contract.
The only issue is that Yuri lost the rights to her character and model, which was not a good look at the time. However, Yuri had no problem with the arrangement when Sakana negotiated her initial contract. Still, I'm glad Phase has changed how they handle Invaders IPs after to avoid any future potential optics issues there.
No other talents at Phase stuck up for Yuri after her graduation. For a group as outspoken as Phase, I can't imagine that not a single talent would not say anything in her defense if she had been wronged. Second, Yuri has seen some prominent talents turning attacks on their character into their own PR wins, like Doki and Sayu. If she had a similar story she could have easily parlayed that into her own PR win but she has not. If Phase had actually treated her poorly, she must have treated Phase so much worse in return.
