@tbkkfile, my problem is I could give two completely different answers to your rant, one positive and based on philosophy and empathy, and one negative based on myself and actual experience.
On the one hand what most of the chaps here say is exactly true. there is no logical reason why things should not get better at any time your alive sinse wellbeing is a state of mind and perceptionn. I have even seen this happening myself. At the anual music school I go to there is a lady in her 80's who took up singing in her late 50's after she took early retirement from being a nurse. The first year I met her I was amazed at how good an alto she was and her stage presence. The second year, something was going wrong, she'd had some medical problems, was walking with a cane and was getting bothered by the fact that she used to be a metzo and could no longer sing most of the stuff she used to, and was feeling everything was pointless, her mental state even seemed slightly worse.
The next year things were around the same, which was quite sad. this! year however, she'd changed completely. she still walked with the cane and had the issues, but was almost a different person, and had taken to performing amazingly funny commic songs that didn't have the range, but by god! they were hilarious, and she had the presence on stage to make them work despite now being 84.
So, this is a case where someone clearly progressed in her life even though she is probably coming towards the end, which supports the idea that wellbeing is entirely perceptual, and it's a state that can be accomplished with enough work. That the idea of trying to assess a life based only on some external set of achievements is always going to lead to problems, and that the ideal recommendation is to try and enter a state of appreciative perception, a point where a person can actively enjoy! what is going on in life, not just "be greatful" but actually participate in that gratitude, where instead of saying "I had an idea for a great novel but didn't write it because I spent too much time reading other people's books", you say "wow! I loved reading so and so, it really made me think and opened my imagination to more possibilities"
That is my philosophical position if you like, and the one that is based on my desire to see you, and anyone else recover from this. I ironically wrote something very similar in an essay on the concept of fear of death and loss of achievement back during my masters when i was 23, about 9 years ago now.
The problem I have is that that isn't the world I see myself in at all. my own life has stagnated to the point of nothing mostly due to all this recovery crap, and frankly I'm sick of the hole thing and of trying to get somewhere and getting no where! Hell, my life hasn't improved at all sinse I wrote that sodding essay, if anything it's all got worse!
So, do as I say not as I do :d.
Seriously, I am now finding myself wondering if I was actually incorrect in thinking that alterations in perception of achievement are just what is needed, that it's simply a matter of saying "I'm going to enjoy this and not worry about that" and will yourself into a position irrispective of missfortune. I now find that idea hopelessly naive and way too shallow, sinse it is! possible to fail at everything and get so used to failure that there is no possibility of anything else, to be in a position where all the will and self perception in the world just won't do anything because every effort goes no where, that I've spent so much energy trying to climb out of the dark hole and sliding down the side that there is no point even trying anymore.
I don't know if there is an answer to this, but despite what I used to think I now find myself in a position where I actively feel resentful of the fact i've been trying to change, and Fuck all has happened!
This isn't to discourage you or anyone else from trying, your not me, you might have either more will power or more luck or whatever, only that I am less certain there is such a universal solution to fixing yourself from the crap given to you by abuse and isolation when life won't cooperate, and heck there might be a better answer that I haven't yet discovered either, sinse while I am sick of trying to improve things in my life and fuck all doing any good, I do have faith in my own capacity for invention, even if I suspect I am just inventing more creative ways to try and fail.
I'm sorry if this isn't the encouragement you wanted. My empathy for your situation would like to offer some sort of hope or wisdom or something, but anything I thought I knew about this I am no longer certain of anymore, at least I can say I'm sort of in the same boat if nothing else, and hay if anything is proof of the irrelivance of age that should be sinse I'm 25 years younger than you and still! have the same problem.