I am not a politician, but it appears to me that some truths are so obvious, you need only a degree of interest in human nature to be aware of them, and I have pointed them out many times over the last few months and years, so in no particular order -
The EU doesn't want the UK to leave, so it absolutely will make it as difficult as possible in order to discourage any other member state from seeing the UK have an easy exit, and be minded to do the same.
The EU holds the UK in complete contempt, and always has done, so from the get go, its negotiating position will be high-handed and pompous.
Bearing that in mind coupled with the simple ecconomic truth that the EU exports twice as much to us as we do to them, we were in a seriously strong position entering the negotiations, and should have played hard-ball from day one - These are our terms, meet them or we walk.
For some reason we have arrived at the notion that leaving without a deal will be tantamount to the end of the world as we know it - such has been the rampant scaremongering that has taken place.
Yes there will be disruption, but disruption is an unavoidable given, we simply have to get through it - and given that the EU wants as little disruption for its own benefit, the notion that they will stop trading is simply a nonsense.
Now we face a situation of a potential Customs Union where we remain tied to paying into the EU, with no actual say in its regulations, which, correct me if I'm wrong, was not what the referendum vote demanded, and Parliament is honour bound to provide.
We should call the EU's bluff and walk away with no deal, you will be amazed how quickly they will align their regulations to allow trade to continue with us - because they need to, and somehow our superior bargaining position, which has remained throughout, is being ignored as if it doesn't exist.
Walk away Mrs May, the country, and history, will thank you for it.