The issue is effectively that Blizzard released Starcraft 2 during a time where RTS was seen as a forgotten genre entirely, the best you had was the Company of Heroes & Dawn of War.
If they had released it 5 years earlier it might have allowed the genre to stick to the huge cultural legacy it had, at least in Korea.
Let alone the fact that the story of Starcraft 2 was... white-washed entirely compared to the OG & Brood Wars.
SC2 plays pretty great but the plot really went off the rails. Brood War was already worse than base SC plot wise but at least it was still rather dark. SC2's plot feels like garbage fanfic.