So does the US, and Japan, and ... basically every country. Each country is going to have pros and cons. Talking with my Korean friends, their perspective is that the US also has plenty of problems, social and otherwise. Are they wrong? And we've had discussions around e.g. why US cops are going around killing US citizens, etc.
The pros for Korea for me include hospitable people, great food, universal healthcare, and fantastic public transportation (you can get around basically the entire country via bus/metro/trains with a unified T-Money card). I also felt a sense of unity that I don't often feel in the US.
Some cons would include a work culture around working insane hours and compulsory drinking. Those are changing with the current generation though. Schooling is extremely competitive since everyone is trying to get into a handful of colleges in order to have career prospects with the large conglomerations. And having to worry about the air quality index is annoying from my US perspective.