I kinda knew about hyperbolic discounting, for a long time.

You knew you were discounting the future, sure, but I don't think that's the same as knowing about hyperbolic discounting.

I am very much pro-pleasure; no-one should have to give up on that. I guess I'm lucky in that my favourite pleasures are relatively safe ones like sex and drugs, so I don't have to discount the future to enjoy them.

I'm really sorry to hear you feel so bleak about yourself and the situation you find yourself in; it sounds like you're not alone here.