Hello b,
I had a similar situation with my custody case. AX's lawyer talked him into doing a substance abuse evaluation at the last minute b/c he could see the judge was going to order something no matter what. Ex reeeeaaaaallllyyyy didn't want to do it. Everyone in the courtroom heard him through the wall, screaming and yelling at his attorney in the conference room.
AX did an intensive outpatient treatment, got a neat little printed certificate and promptly returned to drinking. He did it to appease the court, not because he wanted to be a sober dad for our son. This was all a few years ago, but I remember how discouraging that realization was for me. You absolutely did the right thing in enforcing the sobriety requirements in your court order. Never doubt it. Much love to you and your family.