One show that was unfortunately canceled too soon and looked like it was putting a more realistic spin on the whole "end of the world" trope was "Jericho". It

One show that was unfortunately canceled too soon and looked like it was putting a more realistic spin on the whole "end of the world" trope was "Jericho". It was quite slow and the characters spent a lot of time trying to figure out stuff like how to heat their house, how to make sure they'll have food in the next few weeks, etc. Maybe that's why it didn't work.