You don't want that in an aRPG. Smarter enemies will behave the way players do in a pvp scenario in these games, which is a lot of running around, spamming your spells, trying to connect for minutes without any progress, until one of you finally clips the other and two-shots him. It's a frustrating experience, not an engaging one.smarter enemy behavior
Smart enemies are good in games that focus on tactical gameplay, not on farming monsters for loot and xp.
Your point about every other aRPG contender being a miserable failure is also wrong. People are enjoying PoE, Grim Dawn, Last Epoch and Hades very much. Just because none of these represent your perfect ideal of the genre, doesn't mean they are bad additions to the genre.