It's about the journey, not the destination.

Making a camp up on the mountain range, mining the ore and loading it into a cart, pulling the cart down the perilous mountain path you've made through the forest to the dock, loading the ore into a boat and sailing it down the coast to your settlement you've built up yourself to smelt in your cool forge building. Those are the things I remember from Valheim, not so much the boss fights. If you want nothing but boss fights done much better than here go play Shadow of the Colossus.