Such AIs have existed in Brood War and Dota 2 for a very long time now (pre-LLM), problem is they aren't very fun for humans to play against.

bah, such a pity we didn't have those in wc3 times. bots sucked badly.

I could play online, but my dial-up costed $1 per hour for 250ms latency and near guarantee of at least one disconnect per hour.