Not once humans adapted to it afaik. AlphaStar got to top grandmaster level and then that was it, as people found ways to beat it. Now, it may be that the team considered the project complete and stopped training it. But technically - as it stands - Starcraft is still the one game where humans beat AI.
No, the version which played on ladder was much weaker than the later version which played against pros and was at BlizzCon -- the later version was at professional level of play.
