Definitely. At some point, regardless of your age and what everybody says, you reach the conclusion that you're broken beyond repair and that no matter what you do, nothing will get better.
Time does NOT heal all wounds, and if you feel like you wasted the best years of your life (just like myself) and you've been through much more than you can virtually bear, going forward would be pointless, in my humble opinion. It would be like trying to build a castle in the air. It will collapse before you even start to actually build it, because there's no foundation, there's nothing that can stand it (a stable, trauma free life and the willingness/motivation to move on).
It's our choice if we want to keep on living, with the awareness that our future will be miserable, or if we want to stop right here. I'll go with the latter, and I couldn't care less if people will criticize me and will consider that I wasn't strong enough and that I should've tried harder. They haven't been through what we've been through, period. :)
Hugs!