If you are seriously thinking that your family would be better off without you -then please talk to someone … there is a link here and you can find a helpline in your country to contact: https://www.befrienders.org/
I too lost my 20s to gambling – it probably took most of my 30s to recover – but I was in a much better place at the end of it and I was married in my early 40s – so it is never too late!
I did it has given you lots of good advice and it is difficult to add to it – but I would just ask if you have spoken to any of your family or friends about what you are going through. Challenging this addiction is hard when you are alone with it. Having people close to you on your side would help you enormously. Keep posting here and it would be good to see you in a support group soon. I wish you well.