Having spent over a decade as a labour negotiator for management, I can say with some authority, those who suggest Canada should have been more open to compromise earlier, don’t know what they are talking about.
Canada’s leadership knew early in the negotiations that they were dealing with someone who is unwilling to compromise. As this Star article describes, his ‘Art of the Deal’ is always one sided - his side. Canada should refuse to have any further discussions unless the other side is prepared to bargain in good faith.