Likewise, although it has only been recently that my opinion of human rights in the USA has declined — America takes its constitutional rights very seriously, or it seemed to until Snowden.
They went wrong way before Snowden. Guantanamo at least. Patriot Act, arguably. And then there's a rather disgusting way the Vietnam War was waged. Or the systemic racism that goes way back, regularly with deadly consequences.
The US has lofty goals and noble promises, but has always fallen far short.