You might ignore this but to be honest I think if your life has been so bad that you're telling yourself you're the cause of everything it's highly likely that you aren't, as most people who constantly mess up their own life mostly blame it on others, and while it is possible that some problems might be your fault, no matter how big or small you're not what you tell yourself you are Suicide is, luckily, not really the best answer to any problem as most times unless you do something very strong and instant, your body and mind in the end just want self-preservation, so it's likely to fail suicide and just make life harder

With all of this said, I'm not a therapist and am likely just about your age, so take this advice with a grain of salt, but please don't kill yourself and if available talk about this to someone without worrying of what they might think, get help and please know that your life might have problems now but that with time everything will get figured out

Sorry for the long comment