Hi Jess, I agree with Georgia and I think your need to walk away. Unless he admits he has a problem and is going to do something about it there is very little you can do. I wonder how he is affording his lifestyle if he is not working and hope you’re not funding it. Doesn’t sound like he is living with you as you have separated so is he back living with his parents or friends and are they awareness of his drinking, drugs and gambling?
You should not have to put up with his abusive behaviour. You take care x