It's also about destroying US soft power in general. Putin wants an isolated US so he's having Trump torch every bridge with every ally the US has. Any country that the US has a friendly relationship with is in the firing line.
I don't even have a problem with isolationists (provided they don't invade anyone), it's just infuriating to act like anybody owes the US anything for what they essentially imposed on others and benefited from. E.g. Canada
PS: I'm not saying that americans were not stiffed, there is a lot of poverty in the US, but they need to ask their local billionaire oligarch why the crazy wealth they made with these partnerships didn't "trickle down" to them and why billionaires pay lower taxes than anyone else.