Maybe, I mostly gave that disclaimer to say that it actually doesn't matter much. Even if it's worse, that's still better, because it's over there.
But yes, generally, I assume virtually every developed country (and some of the kind of developed countries) have a more just and competent legal system than the US.
The US is an interesting beast, because when you compare it to the entire world on a bunch of stuff, it doesn't seem so bad. But when you compare to countries that have, like, clean running water, then it really falls flat in a lot of ways. This allows apologists to basically justify anything the US does, because somebody, somewhere, is doing it much worse. Hey guys, look at Uganda, they're genociding gay people!
Not being an expert in every single country's legal system, I would guess that the USA's is about middle of the spectrum in terms of badness/fairness/justice.