I still play the original starcraft (broodwar) every week, and I'll have to agree with you.

once the AI is given micro mechanics and perfect execution, you just can't beat it: https://www.youtube.com/watch?v=dOIgFkyfStg

However, pros can still perform "cheese" tactics where they attack extremely early on, and the AI won't be able to properly defend because it needs cash to get an army. So if we do start to see deepmind eventually play starcraft, it will need lots of hand-holding and special programming to deter early cheese tactics.