OP... you are exploiting the combat pull distance and complain the AI is stupid? Do you realize how that sounds?
How about this, just for your game Larian patches it in that enemies can throw barrels at you. Yes, the same distance YOU can throw barrels, and the enemies all get teleport spell, yes, the same one you have. you know, the one that puts your mage right in a lava pool, and your warriors in a sea of fire.
Point being, Larian designed the system how it is. The AI isn't stupid, it designed to be winnable against without frustration.
