1: Saying we want a frictionless border is as far as we can go at this stage. What more do you expect? Should we bring some dancing unicorns to do the tango with leprechauns? Once we the outlines of a final trade deal agreed that will determine what happens at the border and if you're not happy that its frictionless at that stage then that is the stage to suggest changes.
2: Nothing to change for existing citizens to be formally agreed in a Treaty is specific. There's a lot of specifics behind that too as Barnier himself has said.
3: Again our obligations cease the moment we leave. By the end of a transition period we will have paid in full for all our obligations even under the multi-year agreements and paid in full for five years after the referendum. If that isn't long enough for you to get your books in order without us then maybe you shouldn't bother.
4: Your reference about not giving "a flying fuck" and about whether or not we "desperately need any deal" should demonstrate clearly to gogo who is being unreasonable here.