In my experience the handful of attempts at couples counselling were a joke as there has never been much traction in actual recovery to address any issues outside of the addiction.
It seemed to me that all other issues aside from the drug addiction ( affairs, deception etc) were minimized or rug swept with the primary focus being his recovery & of course how I as a supposed loved one could support that recovery attempt. Looking back it seemed to add weight somehow to the ridiculous idea that any behaviour is acceptable in addiction/early recovery and somehow became something to hide behind if any other issue was raised that wasn't within the comfort zone.
Individual counselling for me has been way more productive.