I don't think so, they've had fairly high transparency on most pf their elections, have a gopd numeracy and literacy rate, much of the protection of right has been pretty good outside of the enforcement side and some of the Children's rights issues (eg. Marriage laws and the private Child punishment industries).
I think most of the time they've been much better than most theocracies and authoritarian states. The US has had some prison labour but no where near as bad as say the Saudi system of slavery.
The US has bad patches, but they're far from the worst. Political freedoms there have mostly veen good up until recently.
I really don't think you can convert this Simpsons meme to being about the history of the US throughout all time (seems to be about the modern digital global, post 24 hour news cycle period of humanity we're currently in, I mean, it's an internet meme, so globalization and the Internet are the bounds of it)...
I think people like you, who get into this large political arguments with a totalistic "this debate in the comments will sort out the truth for all time" over a modern day meme are lame and stupid. It's just such a stupid game to be playing.
"This Simpsons meme is a commentary on the rest of the world's view of America during the civil war" is just - a stupid take in my opinion.