More accurately, It was the domineering my-way-or-the-highway style of the English Politicians and Political Class that led to Brexit - too many times the UK demanded special treatment and exemptions. When they couldn't blackmail the other members anymore, UK threw a wobbly.

Plus, of course,  a healthy dose of the likes of BoJo using alternative facts to promote their own political careers.

Brexit means Brexit apparently - and that means the UK loses all its accommodations and exemptions. 

Obviously the UK can negotiate new exemptions and accommodations as part of its of its new found ability to negotiate its own trade deals, but one would naturally expect the attitude of the EU to be different to a non-member.