Problem while playing the campaign.

Hello. I played "Heroes III: The Restoration of Erathia," specifically the first campaign. In my opinion, this campaign is terribly unbalanced. The player is simply overwhelmed with a huge number of enemies and monsters to defeat. With sufficient skill and the right approach, they can be dealt with in a matter of days, but if you take your time, it could take months. The campaign is clearly designed for inexperienced players. All the fun of playing is lost with this setup. It might make sense to play with cheats and according to certain rules, but then the campaign, after being completed, would be marked with a "Cheater!" rating. In short, there's no point in playing it officially, and playing with cheats isn't great either. Are there any ways to improve the situation? I've only come up with my own solution: creating my own spiral-shaped maps and campaigns where the balance is more or less maintained. That's what I'm doing.