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I played the first mission of the Campaign and didn't complete it. I got stuck at the demon outpost: 57 fire hounds and 15 demonesses easily defeated my 2 Knights, 13 armored soldiers, 20 crossbowmen, and 53 militia, and my luck (3) didn't affect the enemy. This is not good; the balance is clearly off. Here's another thing I didn't like. The experience gained from battles is too low; wandering around and fighting neutrals to gain experience and skills is a waste of time, and that's wrong. The main character also didn't inspire confidence. Why does a Knight need a dwarf skill when there are plenty of his own? The proposed leadership would be more useful if replaced with attack or light magic. In general, in my opinion, the main character needs to be strengthened at the beginning: it would be good to give him about 40 snipers, some kind of powerful artifact, and it wouldn't hurt to add haste to the spellbook. Otherwise, getting through the demons and the monsters on the sides is simply too difficult; is it just for show? However, this is just my opinion.
Added 13 minutes later
Through trial and error, I finally cleared the first demon outpost, but I was left with almost nothing. So, on the second day, I run into a new outpost - 15 hellhounds and 10 cave lords, and my main character has nowhere to replenish his forces. Is this a joke by the author, or is this his idea of completing the campaign? In addition to what I wrote above, I'll add that the first mission shouldn't be made into an extreme challenge. No matter what (even if there were no losses), I wouldn't go to the second outpost. Did the author even try it himself?