It's so much simpler: there was a priced offer of some kind to the board. Some board members disagreed and tried to fundraise. The total valuation was not a sufficient premium over the other offer. The other priced offer was withdrawn. Consequently those "some board members" were taken off the board, by hook or by crook.

All these other conspiracies are ridiculous and do not at all reflect much simpler, economics-driven realities that the board's backers - investors - are interested in.

It's like that Altman and Brockman wanted to take an economically positive offer now, say a complete buyout from Microsoft, and the rest of the board wanted to do an additional fundraising round that would be far less cash but a far higher valuation. Now that the private fundraising is probably signed, those guys are out.