Not to derail the conversation surrounding subjective rankings on a fan site, but looking at the top 30 internationals signings of 2019-2020, only one has made AA. Jasson Dominguez, who signed for 5.1 million, has an OPS of .743, career OPS of .781.
So, logically speaking, every MLB team is "abysmal" when it comes to international signings.
And when looking at the top-100 Pipeline prospects, no team has more international prospects on the list than the Brewers. So, maybe, they aren't so bad at this.