I'm 25. I'm a loser and I feel like a failure

So I'm a 25 year old gay man who currently lives at home with my mom and my older brother, who's in a more or less similar situation to my own, though that's a whole other story.

For a little bit of context, I contracted depression from my parents before I was even born. For my entire childhood, for an alarmingly long time (around 8 years maybe), I cried every single day because I couldn't find it in me to be happy. I wasn't a happy child, and I went through abuse from my brother, my cousins and even bullying in school because of my size (I'm way taller than average and have never really been too good at taking care of my weight, though lately I've been getting better at that at least), as well as my very obvious gayness from a very young age. So I didn't really grow up knowing what it was like to feel good about anything. More to the point, because of my early depression, I often found myself with suicidal thoughts since the age of 9. I've been getting over then with the help of a therapist, but sometimes it feels like it's just too much for me to handle. I feel stupid and ashamed.

Now, at 25, I find myself here with a mother who I feel hates my guts, a brother who makes things worse, and a nonexistent support network. I trained to be a voice actor, and I was told by my teachers and a few contractors many times that I was really good, but because of my fear for the unknown, I was never able to follow up on my talents. I've found myself giving up on my dream, and I've looked for many meager jobs, but no one wants to hire me because I'm too old to be so inexperienced, which makes everyone think I'm lazy. I can't get anything done, and it's driving me insane. I feel like an absolute waste of space, and despite my mother often telling me she supports me, at one time she tells me one thing and then at another time, she tells me something else entirely. I recently had a conversation with her, which had helped me attain a little bit of peace, but today she went off on me about being a freeloader who can't even get a job. It hurt, because I knew it was true. It feels like everything I should be, everything I COULD be, everything i had a chance of being has been all wasted and lost to time.

I don't know what to do with myself. I feel like every single choice I've taken has been the wrong one. If anyone's ever felt this lost and has any tips, or even a few words, I would be grateful to heaven and back.