Elon Musk secretly used control of his Starlink network to cripple a Ukrainian military operation while it was under way, in defiance of American foreign policy.
He is an oligarch working against U.S. interests, benefitting his fellow oligarchs in Russia. His biographer seems to think this is just Musk being Musk, quirky and idiosyncratic.
https://www.cnn.com/2023/09/07/politics/elon-musk-biography-walter-isaacson-ukraine-starlink