3rd offline tournament

Yes, I'm just amazed. They claim THIS is balance, but based on my own experience, I don't see any balance – whenever I don't play as a mage hero, I always end up in a complete... where is this balance? Everyone plays like "idiots," either focusing on attack or defense. Where is our so-called balance? I think (this is a suggestion for Horn) that the magic resistance should be reduced. Playing as mages is a complete disadvantage. From now on, I probably won't do it anymore. I just got used to it and always enjoyed playing as them. It's really frustrating.

Don't blame the lack of balance for your mistakes. On this map, warriors are dominant. The fact that there are black dragons here, which you can't defeat with magic, should have indicated that.
The poor performance of mages in arenas is explained not only by the general weakness of mages but primarily by the weakness of their primary stats. You needed to invest more in stat-boosting items! Who stopped you from equipping dragon armor, for example?
The balance is, of course, even more skewed towards warriors. But it has always been this way in Heroes. Magic damage is fixed, while unit damage is differentiated. The essence hasn't changed.
And Thorgrim's resistance has already been reduced. As have the levels of Mephala and Tazar in the arena. That is, they were already thinking about balancing warriors in the arena.
You need to learn; I started the same way...