There is difference between the industries wanting to continue trading to the UK easily and the EU stance. So no, I've not missed any point.
How can offering a final chance to act reasonably be immature ? I suspect a concealed insult.
There is nothing remotely unrealistic about the UK requirments which revolve around common sense benefit for both sides. The case is clear as per my reference to EU industries above. Otherwise they wouldn't be so disappointed to see us go and hope we'd stay.
The advantages are mutual, the EU is willing to cut it's nose off to spite their face, or more accurately the noses of member countries, which doesn't much hurt the EU elite.
I see no analogy with a ball, we have nothing that we are walking off with, save our sovereignty, which is supposed to be ours anyway.