I can understand you being good at the game and not finding its AI challenging, but I'm surprised you don't find SC2's AI standout. Compare it to, say, SC1's AI. Or, other games I know well, like, AoE II, Zero-K, Men of War, Combat Mission. It's a qualitative difference for me.
(a) has advantages the player does not (b) has an APM beyond what most players do
Which is standard for video game AI but you highlight SC2's AI as if it is relatively standout.