I have also thought of that, I mean everyone who suffers from depression thinks about that. It's logical as your brain can't guide you through fine decisions because you are affected from your emotions.
When I was 12, I was in the 7th grade, ugly-looking, short as hell, my family wasn't very wealthy and I used to get bullied a lot. This happened to me all my life to be honest. I have been bullied from the beginning of my life till today.
Anyways, I would always cry to my mom because I didn't have good-looking shoes as my mates or I was the ugliest of all. She didn't care at all tho, and she would just take me a slap away.
I was always and always have been alone. My family is very strict and traditional. My friends are 99% fake ass cunts who talk shit behind my back. I kept all thoughts, emotions, angriness and insultings to myself.
Sometimes the only life key to me was commiting suicide. Once I tried to jump off the second floor's balcony but I was scared to do it.
I tried different medicines at the same time but it didn't do anything to me somehow. I even cut myself with a broken glass, and I didn't even cry because of how miserable my life was. My parents didn't give a fuck.
But at the end, I always thought....there will be better days than today. I will have a life, and I will live it the way I want. I will succeed and everyone will love me cause of that.
I got stronger, stronger and stronger until I didn't give a fuck at all. Now I think depression is for people who are too weak for this life. If you can't face the difficulties your life crashes onto you, then you better stop complaining on how unfair life is to you. You're not made for this world.
I hope this helped you.