Well, the core countries of the EU want further integration and cooperation, which the britts don't want, so I understand their decision to detangle themselves from the EU, but ..
it should've been clear from the start, that it has to be a decades long process, so they really needed a plan with several steps (EU > EEA > customs union > free trade agreement) and a strong intergenerational consensus in this matter.
A catastrophal crash out might in the long term lead to a similarly competitive economy as doing it step by step, but imo there will be faaar more suffering along the way (especially for the poorest britts) in the crash out scenario.
well, not wanting more integration and cooperation is also stupid.
I LOVE ICELAND!