The more I read the screenshot, the less inflammatory it comes off as. Really, the only actual issue is perhaps what Fulgur said because he's taking a stab at corporate projections and guessing that Council did not achieve what Cover thought they would after Myth (which might be true but still).
Reading it again, Vox's comment is a direct response to Shu, who is meme'd in the NijiEN community as the 'Tech Support Guy' (Shupport). Shu says that he applied for Hololive and they didn't want him, and Vox responds says that 'Holo tech in shambles but Niji thriving thanks to Shu'.
It's a joke that can easily be misconstrued, but I do now think that the intent was moreso to compliment Shu's impact on saving them during stream troubles than it was a specific dig at Hololive.