Most US citizens couldn’t point to Nicaragua or Chile on a map, never mind Iraq, Syria or Afghanistan. So realistically, the chances of a US President getting held to account for abusing international law in those places is zero.
Biden could declare war on the Czech Republic, and most people in the States would assume he probably meant Cuba, and not be all that bothered. When the Rule of Law is blatantly abused in Washington though, it gets taken a bit more seriously.
Tgat may not be right, but that’s how it is. Don’t expect the UN to stand up to the US either - their headquarters are in New York for a start