Silly computer, can we get a fix?

For example, I am very surprised by the modern tactic called "divorce," where the computer cannot correctly calculate priorities and choose a unit attack tactic, dividing its attacking stacks, which chase after a single decoy throughout the battle, paying absolutely no attention to ranged units.

You have Sandro from the second Heroes game as your avatar. I hope it's not a secret to you how neutral units react to ranged units? They are ready to run 10 turns around to somehow reach the ranged units. That is, from one extreme, we get another. In any case, no matter how much the AI is changed, players will learn to make it a "dumb computer." It also turned out that the computer's role is to be a bystander in a game with people. Therefore, I do not like the idea of making any changes to the gameplay.

However, if the AI's intelligence is brought to the level of chess, it would certainly improve it as an opponent. But firstly, this is a very complex and expensive process. Secondly, playing chess against a computer is boring.