I’m going to give a differing approach here, as I think some of the info above is outdated and wrong.
Firstly, the drug and alcohol research and services field are moving away from the term ‘alcoholic’ - preferring to say ‘alcohol use/misuse disorder’ or ‘substance use/misuse disorder’. The reason for this is that alcoholic is a nebulous term that people tend to decide means ‘worse than me’ (like the old joke that an alcoholic is someone who drinks more than their doctor).
‘An alcoholic is someone who drinks in the morning… I don’t drink in the morning so I’m not an alcoholic.’
‘An alcoholic is someone who drinks all day and can’t hold down a job… I don’t drink in the day and still have a job, therefore I’m not an alcoholic.’ ‘An alcoholic has to drink every single day… I had a day off last week/month/year therefore…’ etc. etc. It’s a term that carries stigma and encourages denial.
I’m sure your DH would deny that he’s an alcoholic. It would be harder to deny that he has an alcohol use disorder, given that he is drinking in excess of 150 units per week - over ten times the recommended limit.
People who are drinking at unsafe levels don’t have to have a ‘rock bottom’ to stop - that is an AA myth. AA works for some people, and that’s great, but it certainly isn’t the only way (nor, arguably, even a very effective or helpful way). I do agree, though, that you didn’t cause it and you can’t control it - only he can acknowledge that he has an alcohol use disorder and that he wants to change that.
You can decide what you want to do about it, though; ie what you’re prepared to put up with. His resentment about the missed career opportunity and all the cost of living stuff sounds like typical heavy drinking thinking - it’s a depressant, but doesn’t feel like one because of the immediate and temporary relief it gives.
Does he read? Or listen to audiobooks? This book amazon.co.uk/Drink-Science-Alcohol-Your-Health/dp/B07YX52JLR/]] was my watershed moment; it’s balanced, factual, not patronising or over the top, and written by an expert. I listened to it on audiobook every night for months, until I was ready to make the leap. Then I did the 30 day free Annie Grace Alcohol Experiment, and during that month, committed to at least a year alcohol free (which I fully expect to be annually renewable). learn.thisnakedmind.com/the-alcohol-experiment-registration
Do you think he’d be willing to read or listen? Alcohol Explained by William Porter is a popular one, particularly for men, I think. There’s tons of ‘quit lit’ out there, and plenty of alternatives to AA, too (including Smart Recovery if he does decide he would benefit from the support of meetings).
You could try talking to him (or writing him a letter if talking to him about it isn’t fruitful) and telling him that you’re worried about how he is jeopardising his health and his marriage, and would he be willing to read/listen to a couple of books, at least? No labelling him an alcoholic - focus on the indisputable facts, which is that he’s drinking at a level which is damaging his body and brain, and putting his health (and therefore the health of your marriage and family) at risk.
If he’s not willing to do that, then I think it’s time to consider whether you want to stay with him (and subject your children to staying) as his alcohol use disorder worsens.