I confirm.
The reason for the loss is the same as in the first fight with Johnny. The main hero's level is too low. Definitely, I don't fully understand how to properly level up the hero.
Thanks for the game!

By week 1, day 2, you should be clearing crypts/ghoul zones/medium Dwarf Cottages almost without losses. By week 1, day 3, the main hero should be around level 15-18. By weeks 1, days 3-4, you should be able to break through to the center zones (guard strength 60, recommended to check the guards from the other side of the portal to avoid getting wiped by something like upgraded Rune Priests or Druids). By week 1, day 4, you should already be ready to break a Dragon Utopia in the treasure zone or simple relic guards. If these timings are not met, it means the opening is being played incorrectly.