Precisely. That's why I think they're easily above all other Asian teams even when everything is going terribly for them.
The shambolic refereeing of that shameful tournament in 2002 (I don't consider it a real WC) aside, they were actually playing way above anything Asia has ever produced or is producing. I think as money entered their football in the form of investment, capitalism slowly took over and the collective goal lost its importance. Agents are probably playing a bigger role than their federation or clubs.
Not sure, but this definitely isn't the real Korea. They're better than this.
This.
International football is being killed - not because its lower quality or time consuming, but rather because it doesn't make enough money for middle men and money launderers.
Club football right now is about a mafia of agents, their "products" and various owners who clean money for criminals, dictators and real estate mafiosos worldwide.
It used to be trendy to hate on international football - now its shockingly cleaner than club football.
Sort of like volleyball in Iran compared to football in Iran!
Back to South Korea specifically - talking to their fans - their federation has gone very cheap and so have their clubs - they don't want to spend money on good coaching and they care less about youth development. They also have the sarbazi issue too.
As you said though, they have the pedigree and even at their worst still do very well.
Japan is running into this issue as well. In 2014 I expected them to possibly get into the QFs, in the end they were probably the worst performing Asian team on the field. And even now they are struggling.
Right now in international football...
1. Germany.
2. Brazil.
3-20 - A mix of Conmebol and UEFA teams.
21-60 - a bunch of decent but not great teams
61-end - everyone else.