I enjoyed watching season one but it's not for the squeamish. ( spoilers )
I decided to watch Squid Game even though I usually don't like to watch people die. I tend to develop an attachment to my favorite characters and I don't like to lose them during the movie. I do like the suspenseful elements of the show since i wanted to know who would survive, whether the cop would find his brother and who is running this contest. I also would never have gone back to finish the games after the first game.
The old man might have stolen the show. He was certainly my favorite character during the games and he revealed his identity towards the end. I don't understand why it took Gi-Hun a year to touch the money. He and the others knew the risks when they decided to come back to play the game again. e certainly shouldn't have any hard feelings about Sang Woo's death since Sang Woo would have slit his throat to get ahead. He never promised to help the kid but he did get Sae Byeok's brother out of the orphanage after one year.
I don't think Gi-Hun has the training necessary to stop the game but he might be able to get the police involved. I wonder if a new season with new challenges and new characters would have been just as exciting. It might have gotten old if it was too similar so it might be more enjoyable to see Gi-Hun try to stop the game. It was cool to get a glimpse of South Korean culture with the scenery, food and the games like Ddakji. It was also nice that the homeless man was assisted in the end and that demonstrated that not everyone in society is a ruthless sociopath.