I know the feeling, I consider my whole life as one big failure and it gets worse every year. I've never been able to accomplish anything from my objectives and I feel the same injustice just like you. And what's worse, I gate myself. But I keep going. I've lost all my hope, I've lost all reasons to even try doing something. But I'm still here and I'm still going ahead, even if I don't know, what's ahead. My anxiety/depression took me everything. My dreams, amazing girl, trust of my family and literally everything I believed to. I just live from day to day now, I don't have any plans for furute and I'm in fact a bit scared by future, but I told myself, that I need to get rid of my anxiety problems. Sice I've learned, that anxiety was part of my life longer, than I thought, I have this one objective. Just to get rid of it. And I'm getting better. Slowly, but it's happening. I have my medicaments, I'm visiting my psychologist and I'm feeling a bit better. But my life is empty.
My advice to you is to find something, that you can work on. I've started to do my own comic. And the best thing about this is, that there's no deadline. I just told myself, that I have as much time as I need to complete it. And I love it. I'm working in the story, character designs, artwork and It's great. The comic became my new life. I live just for it. And it was feeling even better, when I realised, that my comic is actually something like a plan for the future, which means, that my lige is not that pointless. And I don't really care, if it will success or not. I just keep doing it and it makes me feel better. Why don't you try something like that yourself? :)