Problems with Heroes of Might and Magic IV.

Try using this unit, it's like a Barbarian of level 20.
And a hero on a horse is just a spectator, who doesn't really participate. He just casts a spell and immediately hides.
There is development. With the hero participating on the battlefield, the game becomes more interesting in terms of tactics.

Yeah, there is development - either you level up your troops, or the hero is constantly in a vulnerable state. And what's with this irrelevant topic about a Barbarian of level 20? Don't think I'm an idiot who only saw the fourth part once, and that was just in a picture. I know that a hero of level 20 and above can take down entire squads on his own - after that, you don't even need an army anymore.