I hate to be that guy but 9-volt Reindeer is a real pushover. You need to learn to roll, manage your stamina, watch how it attacks, what its tells are for its attacks in order to time it right. Use trees and rocks to your advantage, build a bench and dig trenches.

Seriously though, i've never heard of anyone dying 20 times to battery-operated Bambi. You are clearly doing something wrong and repeating it. Whats your armor? What weapons are you using? Do you know how to use them? Whats your food?

It isn't bad game design, it's you. I strongly, STRONGLY suggest you do this solo and DO NOT get help. If you can't kill him yourself, you are basically screwed. Takes less than 50 fire arrows to put him away with a crude bow btw.