Warcraft's Artificial Unintelligence

As you may already know, Warcraft's AI can be extremely aggressive and efficient, even when fighting against multiple human opponents. However the flip side of it is when you destroy a certain percentage of it's buildings, peons or army, then it simply gives up, even if it has the resources to rebuild.

While playing a single player custom game today, I decided to have some fun with it's last remaining hero and find out if it would fight or at least run away. But alas, it just stood there like a sheep waiting to be slaughtered. I couldn't figure out a way to build all of my towers at the same time so that's why some are still under construction.