I think the whole G7/Doral thing is not a miscalculation on Trump’s part, or even necessarily an attempt to get as much out of the USG as he can before he leaves, but rather a giant “Fuck You!” to his opposition, and a further humiliation to show his followers who’s boss. Trump’s all about dominance, and by doing something SO BLATANT and forcing his followers to accept it, he’s showing them that he’s the one on top.