Could you provide more details? What army and level were you at when the opponents arrived? How quickly did you clear the territories before the castle? Did you manage to build defenses? Do you have mods for Mega AI, EWA, etc., which could have affected the difficulty?

Regarding the dwellings, everything has already been mentioned, so it's correct. As for more details: at the beginning of the 2nd week, Steinar is level 9, attack 1, defense 5: 69 harpooners, 28 centaurs, 11 arkata priests, 10 bear riders, 27 mountain guardians + a watchtower; the castle is level 21. First attack: Lucretia, level 17, attack 1, defense 12, casts RaiseDead on ghosts, which the troops constantly miss. But I managed to deal with this opponent, and then with two more, but the fourth (who came with the third) captured the castle without a fight, even though I was there... This is the first time this has happened to me :) (quote)