A divorce seems an odd comparison to choose, but the UK has a large trade deficit with the EU. If the UK leaders had a backbone, they would walk away or be tougher in negotiations.
> 2. See 1. Also, there have been compromises, the UK wants to get unicorns. Full access to the single market yet no freedom of movement...
Do you have any examples?
Why should the idealogical idea of freedom of movement be linked to an economic market? This is an EU idea, and the separate of the two is not a unicorn. See: other trade agreements.