What do you mean by "nothing impressive"? DeepMind's AlphaStar has beaten the world's best Protoss player 5-1 in Protoss vs. Protoss.
https://deepmind.com/blog/alphastar-mastering-real-time-stra...
https://deepmind.com/blog/alphastar-mastering-real-time-stra...
AlphaStar has gotten critisism for it having unfair advantages. It was 5-0 against Mana when it could see and control the whole map at once for example. But after a camera-restriction was given (so it sees the map like humans) it lost 0-1.
With all this said, it is still impressive. Best bot we have by far in sc2!