This is key. Brexit needs to be done competently. I used to think David Davis was up to the job. But quotes keep popping up of him saying stuff like this:
- "Post Brexit a UK-German deal would include free access for their cars and industrial goods, in exchange for a deal on everything else".
You could give him the benefit of the doubt and pretend the EU is run by Germany; so he said UK-German deal while in reality he meant UK-EU. But then Davis said this:
- "Similar deals would be reached with other key EU nations".
On the EU, Davis is truely Trumpesque.
As to your second point: the UK was doing quite well strengthening the common market. The UK has been very good, ever since Thatcher to make the rest of the EU adopt a UK style approach to trade.
At the same time, the UK had an opt-out on pretty much anything that would make the EU move towards more political unity, and when it didn't have an opt-out, it just blocked all further integration with its veto. It was a very negative member in that sense.
When it turned out Cameron got even more concessions, I couldn't wait for brexit. With the UK in the EU, the EU was doomed to stand still (and therefor fail).
I read a quote by some commentator who got it spot on, imo. "Risk: the UK arrives at the conclusion it wants to stay in the EU after the EU27 has long convinced itself it'll be better off without".