DISCUSSIONS on “Rules for online games in HoMM3 and formulas for calculating player rating.”

The answer to your question was already written by the attacker

this is not an answer to my question, but his decision, which does not justify him in any way. he lost not because he lost the battle, but because he surrendered. But

There are frequent cases when there really are no prospects, rather than a weak will to win.

I agree, when you don't see any prospects, stalling for time is not the best idea. But here, as I wrote above, luck was not on his side, nothing more. That's no reason to change the rules, especially to introduce concepts foreign to this game, like a draw due to a battle.

Added 5 minutes later
Someone correctly wrote here: a precedent could be created where a deliberately losing game could be turned around by attacking a scout hero with a scout hero (or even a main hero) and creating a stalemate situation.. Now that would be truly in the spirit of the game!