yes the swamps are unbalanced with respect to the passage from the black forest. Terrain with water that slows and wets the character, very low visibility, and very tough enemies, even with full armor and shield, a level 2 draugr can kill you. Not to mention the abomination.

in general it would be necessary to advance slowly leveling the ground with the hoe, and to put some lights every now and then (knowing that in any case they will be destroyed by the mobs), a good way to prevent the lights from being destroyed is to put them on a wooden pole, in this way only archers will be able to hit them and it will be more difficult. Another suggestion is to take advantage of the indestructible ancient trees, as a point both for building and for escaping from enemies and hitting them from above