You said ‘everyone’ is happy with access to the single market. That is plainly incorrect, hence why we are no longer in it. Plenty of militant Brexiteers were, and remain opposed to us being associated with the SM, for ideological, if not economic grounds. Some people are instinctively opposed to being tied to the EU by any means.
They are, of course, mad cunts.
We have left because of the restrictions imposed, I don't know a brexiteer who doesn't want to trade with Europe at all.