Bless you what a day!
Be careful, he may be trying to start an argument to give him an excuse to go out and get some. I would test him tomorrow and Sunday but don’t give him forewarning.
None of this is your fault, a lot of people work weekends, it doesn’t mean the other parent has to take drugs to get through it. Don’t feel any guilt for doing what you do, he’s transferring his guilt into you by excusing what he does x