Oh, I dunno. Someone with time on their hands could sort out the accounts, and write down the other clear failings of the board. Get someone with UX experience to assist in the design of a webpage. Host the page with a clear a focused target. Then push that webpage to various Everton and media outlets. Here, social media, elsewhere. Engage with detractors, but do it with respect.
Do the media's work for them. Get enough page views and likes and the media will begin to pick up on it. Let it grow organically from there. The club are obviously not going to present evidence of their own failings. It is up to an independent group to rationally expose the problems and outline a plan to address them. If that is rational enough, clear enough, and can get enough exposure...things will sort themselves out.
EDIT:
As for the Blue Union: I have no horse in that race...I honestly don't even know much about that race. I'm American and started following the club in '09, so I don't get a lot of exposure to them. That said, there seems to be blood in that water - they are not likely to be able to be the group that handles this due to whatever caused the friction in the past. But the failings of the past are lessons to the present.
The club will likely lash back at whatever starts this. It's important to keep it completely provable, sourceable and verifiable so they have less ammunition.