Korea just capitulated so badly, set out from the first minute to get the draw they needed to secure second in the group and play Canada in LA (home to the largest Korean population outside of Korea) and let South Africa have as much ball as they wanted. SA are terrible out of possession but with nothing to lose and all of the ball they got the goal they deserved, and with half an hour left Korea went on the offensive but had no momentum and couldn't find the attacking rhythm they needed to score or even really threaten much. Not a good game objectively, but a fascinating one and as a Canadian I'm not upset to get South Africa instead of Korea.
As a side note, I now understand why Spurs let Son walk when they did. He looks a shadow of the player he was.