To be completely honest I don't understand the appeal of Squid Game. It's a very thin metaphor around super shocking imagery --- and don't get me wrong, although it's not my thing, I can understand people liking slasher movies and the like, but I don't understand why this discourse that Squid Game is very deep (and anything other than cheap gore horror) became so popular.
You get the same every time this is done: Hunger Games and Battle Royale were also hailed for much more than the competitive brutality idea they were built on, and really they had little else to offer but that. For some reason people seem to feel the need to say they enjoyed it for reasons other than just enjoying inventive, competitive death games (maybe they really do, I don't know). Anyway, I loved Squid Game but…
Even though you don't see it, I'm pretty sure the creator tried to tell a deeper story in this series. And from that perspective, it's quite obvious why a second season couldn't just be a repeat from season 1.