Herbie88, you may not be able to see it this way at the moment - but the debt is not your biggest problem. It sounds like you have depression, and it is potentially life threatening. If you are making plans to end your life, go to a+e and tell them, really.
This is really important.
Herbie, nothing you've told us about your debt is unsurmountable. You don't need to carry on paying the interest if you can't afford it. If you have someone like Step Change on your side, it really is as simple as that.
But the more important thing is why your brain is telling you that suicide is the answer.
The stuff you're saying, that people would be better of without you, is not only not true it's also classic suicidal thinking, caused by depression.
Please, please seek help. Your children need you alive, more than you can understand right now, but please trust us on this.
Please, reach out to your GP or go to A&E. You urgently need to find people who can help with this. And there is help available. You don't need to feel like this, things can get better I promise.