You don't need to share what that thing is that you're addicted to. I just want you to know that whatever it is, there are at least tens of thousands of people, probably millions, in exactly the same boat, suffering the same as you. You are not alone.
There's nothing uniquely bad or disgusting about you. Our economy is specifically designed to make us addicted to things - to create an artificial demand for something we don't actually need, if you will. There are people who end their lives over the shame and financial ruin caused by their gambling addiction. There are people who go bankrupt and destroy their lives due to their online shopping addiction. I worked with a woman who filled her apartment with stuff she bought online to alleviate her anxiety and depression. When she moved on, a lot of her stuff was still in the boxes it came in. She didn't want the stuff; she wanted the brief feel-good sensation that came from spending money.
There are people so addicted to video games that they pass on everything else life has to offer.
These people aren't weak, disgusting, or bad people. They have simply fallen victim to the incredibly powerful forces that the people who make money off our addictions cynically exploit in order to get rich. Whatever your addiction, you will find online groups dedicated to helping sufferers get together, share their experiences, move past the shame, and find a way out of the addiction trap. I hope you will seek out and join a group that works for you.