What strikes me as uniquely hostile about the experience going through US customs/border is the border workers themselves. There’s this weird little-man-with-power vibe that I’ve not found at other borders, where there’s usually a kind of shared understanding that we both just have to get through the process and then everyone gets to go on with their day. US border attitude is more like ‘I’m valiantly defending the greatest nation on earth against you, scum’.
I guess all of this rant is to make the point that this development is completely unsurprising, and my long-held habit of avoiding travel via the USA even if it means a much longer duration or higher cost feels further vindicated.