Juan had the best plan and most determination to will and that's how it turned out. Instead of burning through massive amounts of calories chopping firewood and hunting tiny little tree rats and such, he went dormant. Karie did lots of stuff that wasted calories like having a snowball fight with herself and cutting saplings for making skis for hunting even though she couldn't draw her bow, etc.
Juan's gamble paid off handsomely. I doubt there have been more than 2 or 3 chat could have pulled it off due to soft living except for a weekend here or there. When I saw he did a 30 day stint in the Canadian winter, I had a sense that he had an edge few others had....that this was familiar ground for him.
Maybe it was the editing and the choice to focus showing her goofiness, but Kari never seemed to be taking a serious approach to the risks and her main task. To my mind, she was focused on the camera and being a running advertisement for her "brand". That and the airy-fairy cultural appropriation of other peoples didn't sit well with me.
I was surprised with the absolute lack of bigger game. That sure threw a spanner in the works for a great number of people that gambled on putting up a big jackpot larder.
My opinion, for what little weight it may carry.