Those people who survived the ice ages grew up in that environment and learned at a young age what they needed to do to survive with knowledge passed down from parents and other adults. The people in this show grew up basically how we live now with a huge buffer between us and living a life where every day is about survival and life or death situations. We aren't waking up everyday trying to figure out how to not die, and throwing people like that all of a sudden into the middle of a completely different situation isn't going to go smoothly. They aren't going to get everything figured out right away.
There are people that are on earth still living under those circumstances. Some people would break, no doubt. Some would survive and some would even enjoy it.
Head to the library and get the information that you need to subsist. Learn from the past. Find out how to make weaponry, and farming tools, and other goods people will need. Then barter with people you meet. Make alcohol for medical purposes. Make soap etc.
Learn to fight the Walkers in a phalanx with swords and spears. Save your bullets, or learn to manufacture artillery.
I would rather watch a group of people that are fighting to live, and not just happy to squat in a dirty prison.
Just my opinion.