Hmm... what? On the 4th month of the game, you already defeated Yorogos?
If there was no cheating with movement points using a hat, I don't even know how you could reach the barbarians so quickly....

I'm playing the map for the second time: the first time, I was completely stumped by Yorogos, again because he didn't attack castles, and I also wasted a lot of time beforehand. The second time, knowing the area, the necessary routes, and learning from my previous mistakes, I reached him as quickly as possible, first leveling up tactics, and without losing key units, I broke through the crystal dragon garrison and defeated Yorogos in the open field (I reloaded many times until I got lucky).

Do you really think the problem is with the too-fast, unplanned timing? (While playing, I saw event messages that I had already passed a long time ago. But according to the script, the AI should attack forces that it outnumbers by a factor of ten.

I saved very often in the game, and each time, by loading the save, I exited using alt-f4 and loaded the desired save.

I started the game with a pawn, considering that it's a very difficult map and that I need to start as successfully as possible, and I followed your advice to run and not lose a single "centimeter" of movement.