Primarily this is a user end issue due to choices made.

1. Always prepare before you go into a biome that is hostile/challenging to you. This includes having a place outside of that biome which is safe or a safe place in the biome with necessities (extra gear, frost or poison potions food etc). So yes having frost potions as a backup, other gear etc is important.

2. If you've died in the mountains, when you respawn at your bed, put one worthless item at the very least in your inventory as you make your way to where you died. If you die along the way, this will create a corpse gravestone. If you then get back to that spot, you can click the grave stone and get resistances for a short time to help you along the way.

Some use this technique in speed runs of valheim to go across the mountains looking for eggs or moder location reveal stones making a chain of grave stones to help them up. It is also a technique used to fight bonemass too since you get short time poison immunity.



And there are lots of other things to do. Just remember its a survival game and death is a learning experience to help you understand to change how you approach issues/situation.

But with all that said, youtuber Asmongold in a video months ago talked about this perceived issue as something he considers a flaw with the game and called it reverse progress with scenarios that extremely discourage players.