No you're married made a commitment now rise to it. Help him get to an agency and agree with above get executive function tested. He may be entitled to extra help. Or maybe it's just the job climate out there

Could it be something like ADHD? Executive functioning issues? Other challenges he is struggling to overcome?

How does he keep losing it? They would need to give him reasons. Is it through his own faults or is the industry he works in dying at the moment so positions are hard to come by? If it's through his own negligence then look at the bigger picture to see what's causing it, does he get tired at work? If so, why? Is he staying up all night watching movies or does he get up to the kids in the night? Is he just daydreams, maybe he has a food intolerance? Maybe he just hates his job and puts no effort in as a result? Find out why and look into how he could change, it could be as simple as a trip to the Dr or he might need to completely change his line of work.