I suspect you don't actually want to "ramp down existence," but I have felt this way before, so I will share my experience.

I used to think that there was no righteous way to live and that I should give up. What I realised was that it was inaction in my own life that I actually found distasteful. I was living in a cruel world but I was a bystander in it, and as a bystander, a tacit endorser of the motions of society.

This feeling becomes more dull as I do my best to live authentically and with integrity by my own standards. Most pathways in life will be painful at some point. It's important that I choose my own pain, not have it chosen for me.

I hope this is of some value to you.