Its the boards fault for allowing HSG to have a say in day to day running of the business essentially.
But, like everybody else, they took HSG's word for what was going to happen and this is how it turned out.
For mine they are both to blame, as it is ludicrous to give up control of your asset before it has been paid for. But at the same time, there was obviously goodwill between the parties that is being pushed to its limits.
Again, if I were on the board, I would have done everything that they have done, including allowing HSG to take control of the club, and openly criticising them to get them to pay the money that is part of their purchase.
If I had the benefit of hindsight, HSG wouldnt have been able to make decisions about the day to day running of the club until the sale was completed.
Oh, hindsight, how important you are.
FWIW B-Dos, the "inept" board were doing what they believed to be the right thing for this club. That was to allow the new owner access to the running of the club, to get it moving in the direction that they needed, rather than a complete reform once handover happened.
Stick the knife in all you want, they just want to see this club succeed.