The only thing that basically cured my anhedonia - Not ejaculating.
Not ejaculating. Stoping porn completely. Being mentally celibate.
I've tried to cure my anhedonia with all the supplements/drugs mentioned here. None of them worked.
Was so close to starting MAOIs, even ordered them from India, but they got seized.
Shortly after that I stumbled upon r/Semenretention sub.
I will say - "flatlines" are a thing you need to go through before you get rid of anhedonia.
I'm 40 days-ish in, and I'm in remission from anhedonia, but still some lingering low mood.
A great resource: https://imgur.com/gallery/nofap-anecdotal-evidence-g4eGH
Some science of why Semen Retention Works: