Cast your mind back to the pre-Brexit discussions on the options the UK had wrt the kind of Brexit.
On the one hand the hard Brexit some were calling for, tge impacts of which were widely discussed.
On the other the ‘Norway Deal’ of exiting the EU but remaining in the customs Union.
The UK government chose the former and in rejecting the latter ensure the maximum disruption to the UK economy.
All of this is self inflicted harm and there is very little evidence that people voted for that harm.
However, the ERG got most of what it wanted.