Hello neutrino: Well... hopefully your psychologist is doing more than simply diagnosing you. Really, what this about, from my perspective, is working in therapy over time to resolve how you feel about yourself. At least that is the mainstream way of approaching it. There are Buddhist practices that also get at this sort of thing. But assuming you're not interested in becoming a Buddhist, therapy & / or psych med's are where it's at. The reality is, from my perspective, the options are pretty-much well known. There are no secret techniques, things one just never hears about, to resolve feeling of self-hatred & worthlessness.

There is a member here on PC whose user name is "Vital" I haven't seen anything from him for quite a while now. So perhaps he's not active on PC anymore. But Vital posted an extensive thread regarding something called "Snap Club". Perhaps you're familiar with it? If not, you could go to Vital's listing of posted threads & find it. It might be a technique that would help you to begin to accomplish some of those day-to-day tasks you're having difficulty completing. And getting some of them done might help you to begin to feel better in general.

Part of the problem here, as you clearly realize, is that you are not able to accept yourself as you are. As you wrote, you have very high expectations of yourself. And when you find yourself unable to live up to them then you beat yourself up for not achieving all that you feel you should. I once participated in a partial hospital program where they told us: "Don't should on yourself!" That's great advice. But, of course, saying it is one thing... doing it is something else. And that's where ongoing therapy comes in I would presume. In all honesty I say: "I would presume" because I never found therapy to be of much benefit to me. But that was at least in part due to my own circumstances. That's why I have become something of a quasi-Buddhist. It's an alternative that seems to work for me.