Using drugs and or alcohol is nothing more than a bad habit.
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Forget the stigma, the labels, the guilt and shame. It's just a bad habit that is no more destructive than smoking cigarettes every day or using a lot of sugar daily.
Over time any of these bad habits breaks down your physical health. Start by taking breaks and paying attention to how your body feels.
That is how you can break a bad habit.
All the other things you have tried have not worked. That's because you haven't treated your bad habit objectively as merely a bad habit.
You've allowed emotions to distort your view of your bad habit. No problem can be solved when drama becomes the focus. Put it aside and you will be amazed at how easily problems can be solved.