Someone in Niji EN REALLY hates Selen
There are way too many things that don't make sense if we assume plain incompetence and lack of experience.
1) Remember Yugo and how he quietly quit with zero drama? Why couldn't they do the same thing with Selen? Just let her quit, say it was due to "creative differences" or whatever. What's the point of making a termination statement that tries to paint Selen in a negative way? Because someone wanted Selen to be seen in a negative way. If the goal was to just end the contract with Selen, they would've done it the Yugo way.
2) Who on Earth thought that 15-minute video with Elira, Ike, and Vox would somehow be good for PR? It wasn't for PR, it wasn't to calm down the angry mob with pitchforks, it was a personal vendetta against Selen/Dokibird.
3) Why was the aforementioned video aired at the same time as Dokibird started her stream? That can't be a coincidence. It could have been released at any other time. The timing was chosen on purpose.
4) Why do Elira, Ike, and Vox have access to Selen's private documents? The documents were given to them to be used as "ammunition" against Selen/Dokibird, which is ironic considering that Doki's lawyer can use it against Nijisanji if Doki decides to take this mess to court.
The only question that I can't answer is...why Selen? I mean, Selen is one of the sweetest people in the entire branch, and lots of artists on Twitter said she was nice to work with. I can see someone having a grudge against Zaion, but Selen? What could she possibly do to piss someone off this much?
Of course, this is mostly tinfoil-hat-tier speculation, feel free to disagree with me. But I can't imagine how Niji EN managers can look this malicious from the outside without, well, actually being malicious.