the problem is Johnson lied about the deal.
he claimed there would be no checks or paperwork...a blatant lie
even with border checks removed there will still be transit documents, customs declarations, rules of origin checks -all done by the exporter.
"continually negotiated" is different from trying to ignore reality....brexit voters blame the EU for checks and paperwork -which is what you get when you are a 3rd country.
Maybe he did lie, but the protocol was widely available for all to see, was well reported on, and the issues that came of it were mostly expected.
what wasn't expected was pettiness in regards of wrong colour ink on paperwork, or taking lorry drivers lunches away, or refusing the import of farm equipment for small specs of mud found in obscure hard to get to places etc.
yes i understand it's in "the rules" but common sense should be applied, a lorry drivers ham sandwich is hardly going to be sold on the black market and it was perfectly acceptable a week or so prior. The UK havnt had food standards slip as yet
edit: saying the above i've just come across this article, which was a bit ironic lol https://www.independent.co.uk/clima...-have-caused-swine-fever-outbreak-698448.html