Ha, I used to think the same thing. I kept losing against them.
But it turned out to be not that simple. They don't just crush everyone.

Mages with the Mage's Sign and a double stack of Imps, with miniatures focusing on initiative and luck for ranged units, have excellent chances.

Letos, with his Plague and Dark Magic, also has excellent chances (considering his very promising Shadow League army, especially against Orcs: Minotaurs attack twice, with the first hit removing Rage; Riders ignore defense; Harpies have no counter; Dragons attack two targets at once; Hydras have a chance to remove Rage from multiple targets).

Wingael, playing as the Elves, and Elves in general, have amazing chances due to their high initiative, and also due to the specific characteristics of their units (Nymphs and Dancers remove Rage from multiple targets at once; Dragons attack two targets. Unicorns blind; Archers attack twice, with the first shot removing Rage...).

I wouldn't say that Necromancers have no chance; after all, Darkness is the Achilles' heel of Orcs.

Dwarves, with Battle to the Last and the Rune of Resurrection, are a very worthy opponent.

And Humans, if they get lucky with their economy, can train cavalry and also easily defeat Orcs.

Thus, in my opinion, everything is fair; you just need to find the right approach to fighting Orcs.
I myself complained for a long time about the unfair Rage ability. And, by the way, it seems that it has already been slightly reduced