There were a few things he could have done differently. For one thing he could have researched the area better. I have heard more the one interview where the guy in the wild took a multiple of years to get set up. They all seem to go into the area for a couple months for 2-3 years. They get the lay of the land, what the plant/animal life is like, full understanding of the weather.
His shooting(with gun, not camera) were terrible. I motionless object that's the size of multiple soft balls from less than 100ft with a rifle s so bad, so utterly bad.
He had a couple things in his kit I would have dumped, it's been a while since I saw the show, but I know he had a bear electric wire system of some sort. Which he eventually stopped using an never had an issue. I would have traded that in for a couple more small scale maps and some Elk leather gloves. He would dig with his hands, get them cut, could have been avoided with some quality gloves.
I bet if he did a season two in the same area he would do much better. Really, he spent so much time out there getting to know his own gear and skills, I assume he has kept up with his learning, and would be much better off at this point.