Cultural relativism aside, I’m sure we can agree on “terrible” if we talk it out. I’m not asking for a “well X country is worse than Y country, so, Y country isn’t THAT bad”. I’d say for this discussion we can go as far back as 1800 for “past” as I’m currently convinced there isn’t a country with a perfect track record going back even that short a time.
Heck, I think there aren’t many people who meet that criteria. You’d need some sort of vegan, who doesn’t use any tech made possible with child miners who obviously doesn’t wear sweatshop clothes and probably doesn’t live on stolen land etc…