How to cope...

AZ is Arizona, US.

I agree with others; he sounds at the end of his tether. If he has moved away from his family/friends, does a job he hates and feels that he has all the responsibility on his shoulders then I can see why he feels anxious/depressed/stressed. If, prior to the move, he was well and helpful then it was the move and subsequent changes to his life that caused the change in him. What was he like before? Does he have children? Elderly parents and concerns for them? Anything else troubling him?
Please sit down with him and draw up a plan of action, if that means moving back I would do so. I'm not sure if that is what you want to hear, but I think he has reached crisis point.

While I don't agree with the way your husband has expressed himself, I think it's more important to listen to his underlying message here. He is in serious distress and I think you need to put this first. Many single mothers cope and your daughter is an adult who needs to work out how to manage her circumstances. It's nice if you can help her with childcare but not always realistic.

Can you clarify if your husband was having mental health difficulties before the move? Is it actually the location, or might he continue to have problems wherever you move to? Obviously moving can't happen overnight but I think I would commit to him that we will move if things can't be worked out, but he needs to seek help now and sort things out with professional support. You don't want to move again and find out that nothing has changed for him. He might think moving will make things better but it might not be that simple.

I think your situation is complex and needs the support of a trained professional to get to the heart of what is going on and what needs to be done to help your husband.

I agree with MOnica on this and CanadianGran asks some important questions on which you should ponder. How would you feel if the situation was reversed? Think about it. He is telling you in no uncertain terms that he is miserable. You need to listen.

You ask if this is "common in blended families." I think it's common in a lot of families, blended or not. Husbands often feel neglected when the wife is overly involved with ac and dc.

I'm curious as to where you moved from. Arizona is beautiful but it's not for everyone. I've spent a bit of time there and love the mountains but personally cannot deal with the intense heat. I've known people who have moved there from other parts of the US and experienced extreme culture shock.

Wow, sounds like you two really need to sit down and discuss it properly. I don't know where you originally came from, but to pack up your life and job is a major upheaval. Was he eager to go when you made the decision? Does he have family he left so you could be with yours? What about friends? You have the benefit of company of your daughter and grandchildren, but what benefit does he have?

You need to make this work for both of you. He does sound a bit desperate, and threating suicide is pretty major cry for help. Perhaps a counselor is needed.

Sounds to me, as if he is at the end of his tether. His whole life has been turned upside down, his wife has given up her job because he earns enough to support her. and then she spends most of her time with her DD and children. Did he have any say in this? It does not sound like it

I would be angry, upset and acting unreasonably if my spouse acted like this lady and just expected me to fall in with their demands that my child and grandchildren come before everything else, including me. I presume he is in a job he hates, because when they moved to AZ, with his wife not working, he had to take any job he could get and quickly and one he would enjoy was not available.

Of course he could be but threatening to tell people it's the OP's fault?

Oh yeah, because men can never be depressed or suicidal!

I don't know. The husband doesn't sound very nice. Pretty manipulative. How about him trying to find a job he prefers? Then possibly the OP could find a part time job?

What was that film called crazy H?

Are you in Arizona ? I was watching a film on Netflix (true story) ...about the Watts family in Arizona ?

Arizona. Are you in the US?

I’m with MOnica on this one, your daughter should be independent by now, time for you to get on with your life.

Where is AZ?

Yes, I appreciate you wanted to help your daughter, but surely in a situation like this, your husband should come first, and if he so didn't want to move and hates his job and it means that you are no longer working so he has to support you, because you are helping the grand children.

I know you have only one child and the 2 grandchildren, but there is many a single mother managing successfully on their own and the demands this is placing on your husband are unreasonable.

I am sorry, my sympathies are with your husband.

I think it comes down to which one of them you want to stay with and support, because I don’t think you can choose both.