I think an alternative to the reddit OP, since he loves coding and has so much experience is to try and create his own product on some niche.

He would get back the joy of coding and still be a programmer, without having to deal with any of the corporate system.

I can fully understand where he is coming from, it's not the job itself, it's the whole system that makes it unbearable after a while.

This is the reason also why there aren't many people over 40 in tech. They have usually by then accumulated enough money and found an exit strategy.