You should be able to loot weapons from enemies by looting their corpses.

I so often find the weapons get pushed through the ground, rendering them unlootable. Sometimes they also fly off into the distance.

This was an issue in Elder Scrolls IV: Oblivion too iirc and fixed as of Fallout 3 (different company but it's an old issue that shouldn't be happening with how much is known about game design now).

(Enjoying the game a lot but this particular issue bugs me a lot.)

EDIT: I don't like idly complaining but I have no idea how to bring these things to the attentions of the devs (nor if they would even understand me as they aren't an English company iirc), lol.

I cannot post links at the moment. But look in this forum for the post "How to report bugs in ELEX 2 so they can be looked into"

Found it! Thanks.