[happytoexplain]

Even giving the benefit of the doubt that they would do a good job: The ends do not justify the means. That's really all it is. Pragmatically speaking, Americans simply abhor an unelected hundred-billionaire who behaves in a mean, trollish, and "hateable" manner, forcing himself into the institutions of their home country in a way that appears destructive and careless. For each individual case, whether it actually ends up improved by some metric (and whether Elon is even actively involved) is overshadowed ten-fold by the societal damage caused, the dangerous precedent created, and the fighting spirit of Americans against authoritarianism.