"Original"

except for Bolivar, and even Bolivar is just Bolivar.

Why are they so against him? O_o
He is not the only strong character on the list. Take Raikkonen, for example.
In any case, this is not a reason to cower.

You can ban the "machinists" so they won't do it again.

What's so wild about them? Well, maybe the Gremlin Master is tough, but the rest are quite ordinary.
Let's ban Stalkers from the Tower, and generally introduce a ban on casting two identical spells in a row;). Otherwise, the Elf will kill everyone! O_O

The fact is that in the first week, you can grab Ents in the camp, or even a Giant. Of course, if you're lucky, but shouldn't we prevent such cases?

We're not playing chess, after all.
What's so terrible about the camp? You can only get into trouble with the anti-morale.
If you can break through it, then it means that things are going well even without it;)

Strategic skill must be demonstrated even before the start of the game, by making the right choice of hero.

You need to demonstrate skill by using the maximum of what you have. Besides, in the tavern, one of the two heroes is always from your faction, every week. You can choose a worthy one from 3-4.
And if the problem is simply that you only have experience playing with one hero from the faction, then that's a different question.

Strategic skill is choosing the "machinist". Strategy in all areas, you know.

It's universal and quite simple, but what's so special about it.

You're acting like children:(