It is strange that the OP is complaining about having to kill hundreds of enemies for a drop, when the game play loop is pretty much "do things over and over". I bet you've chopped down a thousand trees, mined iron for hours in Swamp tombs, and enjoyed the scenery while spending hours in a boat slowly going somewhere.

IIRC, one trophy (think it was Deathsquito) took me weeks to get. On the upside I had tons of mats for needle arrows. The one special skeleton guy with the poison looking aura - you might find one in a tomb... might. That one took forever.

Hell, I remember slaughtering thousands upon thousands of mobs in WoW to get a rare pet... Valheim's grind isn't bad at all.