My thoughts are that without this you will be depressed. From those posts I think you lack the skill set. It's a skill set and it can be learned. It's not a character fault, but an educational one.
There is nothing wrong at all in this. It's just without that purpose you will be rudderless. And when you identify your life purpose that doesn't mean being no 1 or having massive ambition to be so.
And you don't have to have a job to fulfil your purpose. You can try volunteering and that could be using your skill set in a volunteering way.
I would like you to Google I am enough. There is a hypnosis program available which is free and has a module about finding your life purpose.
Then I will be here to help you start putting together your goals.
I am 100% positive this can be turned around. That DB will work on you to become a man only a fool would leave. You have made a good start let's drive some momentum.
Excellent news on the health front.
V
Freedom is just another word for nothing left to loose. V 64, WAW