Real things happen to real people and yeah sometimes things get dark. At least for many/most people things get lighter again and those are the things to focus on. I've been in bad places in my head but managed my way out eventually and I hope people can see there's always a way to find an exit. Also I have over 2 feet of random scars from various escapades which is fun, too.
And remember what's in the past stays there. We all could have a thousand random pasts but the one that happened is ossified and your choices for those are done. What you can control and what's important is your choices for now and the future. Focus on those. Your past could be awesome or awful and most likely a mixture of both, but all that has little relevance to your now if you choose to release as much of that past as you can. Live your now and your future.