The biggest mistake the creators made was forgetting to write interesting characters.

Gi-hun, despite being the "good-hearted" protagonist, has always been a bit of a bumbling idiot. In season 2, he doesn't have a smart friend to help him. We simply watch the bumbling idiot be played by 001 AGAIN. He never learns from his mistakes and is just frustrating to follow. Sang-woo from season 1 was a morally grey character but rational and level-headed, and was undoubtedly a competent leader for most of the show. His character was the perfect contrast to Gi-hun. This season lacked someone like that -- Lee Byung-hun's character is predictable and wasn't as interesting as he was.

The "villains" like the thug and annoying lady from S1 were despicable yet entertaining and somehow likeable. That was not easy to pull off. But Big Bang's TOP and other antagonistic characters here were just annoying himbos that I wanted off my screen. Meanwhile, almost all other characters are remarkably un-memorable. It's funny how characters played by actors that are usually main leads were underwhelming and didn't need to be in this show. I probably would have preferred seeing fresh faces.

It was deeply disappointing how S2 slowed down the pace but had much less depth and emotion. S1 touched on issues like exploitation of foreign workers, North Korean defectors, gambling addiction, etc. S2 settled with young people who invested in the wrong cryptocurrencies (too bad for them), influencers (ughh), or pregnant young moms (generic female character found in too many shows). Some were almost like re-hashes of S1's characters. Also, there were not enough games and too many voting sessions. Did no one in the production feel that it was getting repetitive?? Overall, I give season 2 a mediocre 6/10. (Season 1 was an 8.5/10 for me.)