I try to explain this very feeling to my psychiatrist and occupational therapist. Anhedonia is a bitterly cruel thing to be affected by, when you get zero pleasure from anything it really makes you stop caring about everything. The most disheartening thing with it is that I try to follow the suggestions my occupational therapist makes but it makes no difference to my situation because I get nothing from it, no endorphins, no more energy, no pleasure, nothing nothing nothing. And yes it's pure hell to live this way, for me it's led me to a point where I don't care about myself anymore, it's only a matter of time before I step onto the bus.