How would you see people who are living out somewhere alone?

Where would they do it? There is not remotely enough available land near where most people live that isn't privately controlled.

What would they eat? Getting enough calories from hunting for it to become a frequent part of everyone's life is currently a thermodynamic impossibility. On top of that, food webs are actively collapsing or have already.

I believe there are small groups of hunter gatherers still around. Not in the US or Western Europe though.