They were just not dominant enough imo, they won 12 tournaments over 2016-2017 so 12 tournaments in 2 years vs 12 tournaments in a year vs Astralis. During this time, SK/LG almost always had competition and needed to do well to win, Liquid vs LG at the Columbus major could have been a 2-0 by Liquid had they not choked. To show how undominant LG/SK was, they lost to Cloud9 on home soil in a match up that was so heavily in their favor. It is not like the stars aligned for Cloud9 to pull off a victory in Brazil vs SK, Shroud and Nothing were not popping off too far above usual levels, Autimatic and Stewie played well, but that is it. Despite this, SK lost in a disappointing matter to a team that they should have never lost to on LAN, especially in the finals of a tournament. Whether it was VP, Astralis when they added Glaive, or even a team like Dignatas, they would often disappoint. Had they won Eleague Atlanta 2017, maybe you could debate that it was an era, but they went out to VP as they often did at that time.