don't know if it matters tbh.
economy and trade wise the WTO rules for negotiations means the cards are always shown on the table, politics is usually what gets messy, what can the PM or President get away with in there own government, but that's not a factor in the UK anymore, Bojo has complete control and enough majority that even decent from small parts of is party cant stop him.
they way things stand, bojo doesn't need to face the voters for 3 more years, will be 7 years before there's an opposition party big enough to actually take the conservatives on, doesn't need to appease any opposition, purged his party so doesn't need to appease softer elements of his party, he's been given 100% complete control which means unlike under may and last year he doesn't need to or care to put up an appearance anymore.
Bojo wants no deal really, so he just doesn't care, he dosn't care what the EU thinks or wants or how they see him or what there opinion is, he just dosn't care and is perfectly fine with completely ripping the UK out of the EU whole hog because he knows he's got 7 years between now and when he's seriously going to be challenged by an opposition party to win back public support