Anhedonia is simply a symptom that can appear and disappear. I don't understand the part about it being a "constant".
Once again, it's easy to get in a rut. If your life doesn't consist of anything you find enjoyable, you won't be enjoying anything. That's how it works.
If your life is dull/boring, you don't have anhedonia. If your life is dull/boring because you've given up seeking out things to enjoy, you cannot expect things to improve without change.
While you are describing part of the dynamics of depression there, for somebody to fulfill the criteria of anhedonia he has to have lost the ability to experience pleasure partaking in activities that he USED TO enjoy. A healthy individual does not have to seek new thrills his entire life. Ofc we all have lost interest in hobbies, but it's very striking when somebody claims to not have any fun with things he used to be enjoying a lot. This can be temporary. That's the medical definition (not word by word) and that's also how I experience anhedonia during those lovely depressive episodes.
Just because it's not good, doesn't mean it's equal bad. There is still variation, and room to make changes to your life in order to get less of the real bad and more of the dull.
Anhedonia is not one blanket "everything is equally bad" which it seems like you're trying to insinuate.
There is variation day to day, and within the fundamental effect itself.
While I wholeheartedly agree to this, there are also degrees to the severity of depression. In many cases the differences you talk about simply can not be perceived anymore or become irrelevant due to being so miniscule. In even more severe cases an individual will sometimes not even have the energy to even take a piss outside of his bed, as sad as that may seem. Even if the underlying phenomenom is not an "all is bad" blanket, this discrimination again becomes irrelevant because to the patient "all is bad". I don't want to mix things up here, in rare cases a person can still feel quite a bit of joy, but the tiredness and weakness has him bound to the bed. But anyway, the lines can blur.
Seeking out things to enjoy is the only conscious solution to Anhedonia. Suicide removes the problem, but doesn't actually solve it.
While I like your spirit, I'm afraid some things in life do not have a solution. A change in behaviour cannot offer one, neither can medication or a miracle. Some people are unfortunately deeply fucked and no effort of theirs or anyone else will ever change that, just like nothing will change the fact that some people have glioblastoma and nothing will save them from dying within weeks.
That being said, I think suicide is actually the best course of action for some severely ill people. It might not solve the problem for the people left behind, but it sure the fuck solves it for the patient. I hope that one day we can all become comfortable with this idea and won't force people to have the last action they take in life be colored by feelings of guilt, shame and secrecy, but instead let them make their peace with their last ones as if they had died from a predictable natural cause.
Drugs (of any nature) tend to be unsustainable and a distraction/inadequate help/brief relief at best.
Definitely true for today's primitive drugs when it comes to treatment of depression. We might actually make progress there some day though.
"Of any nature" though? I am highly sceptical, I've seen plenty of people with schizophrenia live for very long periods of time without symptoms, presumably thanks to neuroleptics. Ofc we can never tell, if these people might have not been fine without neuroleptics. There are no good studies on the subject at all.
On the other hand antidepressants should aid in the treatment of depression (and with that ofc anhedonia) through another different way than sustaining some sort of improved state. Especially in mild cases the idea is to give them to a patient in order for him to change his ways during a limited period of time. This is usually aided by behavioural therapy. I've seen it work amazingly way in my formerly completely socially withdrawn friend who has now had a steady relationship for 4 years and doing very well for himself. Without antidepressants, he could've never pulled off that therapy.