I can empathize. I feel my life has just been repeated failure, I have nothing I can look at and be proud of, I have no talent or skill, and I feel like my brain is fundamental diseased in a way that prevents me from ever accomplishing anything. I try to find goals but I just cannot force myself to care, and I end up just letting things go past me without reaching for them. It hurts even more knowing that (especially earlier in my life) I was purely focused on finding some form of 'success' and not having interest in people, relationships, passions, etc. and it still ended up with me getting nothing in return. I think at this point my brain had recognized its incompetence and just given up, unable to do anything outside of the bare minimum. Even the things I still think I enjoy, I just don't pursue them further; I like music and I've always wanted to be a artist of some sort but even with the available means I just don't bother trying, and when I do I fall into frustration and give up quickly. Everyone around me feels human and I don't. I think this has been the largest source of dissatisfaction, knowing that no matter how much I sacrifice of myself it will never amount to anything solely because I am my own limiting factor. I don't want to live this life of passive ineptitude but my mind just seems to fight me and scatter my thought, I am unable to change.
Sorry for rambling with my barely tangential personal issues. Wishing the best for you.