Some el nino, volcano or other cause drought in entire region may have wiped out entire communities. 20k years ago was also much more colder with ie massive glaciers ie in much of central Europe.

Every hunt was fight for life and survival, any injury could be fatal and treatment was practically non existent, broken foot was almost sute death sentence. Winter (and each one was harsh) was barely survived in bitter 24/7 cold and a lot of starvation outside of tropical regions.

You have no actual clue nor imagination with your first world whining about toils of office work which you can easily abandon and not be dead with your family within 2 weeks. You can definitely do better than that.