> He was of the opinion that the best thing for the UK economy was Brexit, and that the the best team to carry out that out was to be headed by Boris Johnson.
Not exactly. I think you need to listen to the interviews.
Dominic Cummins has solid rationale for why he believes what he believes. I would need to listen to them again to remember what he said, but what you are describing was too simplistic.
Also his opinions on Brexit have nothing to do with some of the things he said about how COVID was handled.
> He changed his mind on Johnson, but he seems to be of the view that nothing works and that there is nothing for it but to burn everything down and start again according to the Dominic Cummings vision.
I don't remember him saying that exactly.
> That has never been his opinion. There are many interviews with him on YouTube and I suggest you listen to them.
I've viewed and read an interminable number of interviews with Cummings.
He decided that a) Brexit was a good idea (we can see how that turned out), b) he decided to help get a Johnson government elected, and c) joined his administration as de facto chief of staff and chief advisor. If that's not a tacit approval of Johnson and his government, then what is? Of course, he backtracked later when it was a disaster.