Don't think you can really bash the club over this. Seems that we fully intended to trigger the extension if we lost in the playoffs and didn't get promoted, which is perfectly reasonable IMO. But nobody at the club actually expected the EFL to hit the nuclear button and expel us, so by the time it was confirmed we wouldn't be in the final that 5 day window had already expired.
Can't blame his agent for trying to get better terms really.