Drama itself is excellent. I loved it. But if you watched this subtitled, then you missed at least 30% of the story.
Most Koreans wouldn't use English subtitle so they wouldn't know. Most English speaking audience don't understand the audio so they wouldn't know. But I'm Korean-American who lived 25 years in each country. I'm equally fluent in both languages but we turn the subtitle on for our daughter who isn't very good with Korean. And the amount of mistakes I notice is ridiculous. I am 100% certain it was translated by a Korean who never lived in English speaking country.
One example is the nickname of Kwon. They translated it to "Tactician Kwon". Which is actually a compliment. But the original Korean word used was negative. It should've been "Plotting Kwon". Because he always plotting something against someone. There are literally dozens of these wrong translations per episode.
Bong Joon-Ho's movies such as Parasite on the other hand are much better. I can tell he spends extra effort making sure translations are perfect. But Netflix Korean shows including Squid Game are horrible.
Come on Netflix, there are 1.4 million Korean-Americans who can do better job.