There’s police brutality. For example, in 2014 Eric Gardner was choked to death by plainclothes police during a warrentless arrest on suspicion of illegally selling cigarettes.
Our recent treatment of asylum seekers at the southern border comes to mind; keep in mind that the right of asylum is a human right.
British resident and former U.S. Army translator Shaker Aamer was abducted by bounty hunters while doing charity work in Afghanistan in 2001, then bought by the U.S. and detained for thirteen years without charge or trial in Guantánamo Bay, Cuba. He was cleared for release in 2007 and 2009, but was not actually released until 2015.
During Donald Trump’s presidency, U.S. airstrikes have killed at least nine civilians in Somalia, probably fourteen (including two children).
The ATF gunwalking scandal was as recent as Bush/Obama.
The Ukraine scandal of last year also comes to mind.
Splittings families at the border and throwing kids in jail isn’t enough for you? If not, try to find the article in the Times Sunday magazine two days about an Iranian scientist lured to the US by the FBI who issued him a fake visa and tried on trumped-up charges that were thrown out by the judge. Whereupon he was re-arrested by ICE for using that fake visa and thrown from prison to prison. They wouldn’t let him out because he might flee (yes, all he wanted to do was escape to Iran) when they wanted to deport him. It was a real horror story and it was carried out by your (and, unfortunately my) government.
Not directly attributable to US state as a national policy, but the love of drugs - especially Cocaine based substances is having an absolutely devastating effect in South America, with areas of some nations being effectively narco-nations.
It reaches the very highest levels of nation governance - but its all fuelled by drug money.
during the Iraq and Afghanistan wars we told a lot of natives if they helped the US military we’d give them citizenship here. they put their safety and the safety of their families at risk working with the US. the US then refuses to give them citizenship afterwards.