Bots in game

I found in the game bots at level 2, attacked only 4 units, all heroes are wizards.

What makes you think they are bots? Why does their fighter choice make you think that? Not sure I understand

I'm guessing, from the images, the question is why there's only 2 fighters in a squad.
Answer is, most squads in level 2/3 areas only have 2 fighters in them, to make early game easier.

Yes, you were playing against NPCs. There are both real players and AI-controlled teams in the game.