@Whome73
You sound very lonely and you seem to value and appreciate your wife, so what I’m going to say might not feel directly relevant, but you might find some help in it.
I’m in almost exactly the same position as your wife, although my DC are a couple of years younger. I’m a SAHM and most nights I’ll make dinner for the kids and myself, take them up to bed and often fall asleep there.
On the outside I’m sure I look horribly unreasonable but it’s mainly a defence mechanism.
For example, I’m a good cook and try hard, but DH will usually come in and make a little comment about the food. Unhappy with what we’re having, or it isn’t cooked to his specifications. He’ll often unhappily eat what I’ve made and then order a takeaway just for himself. It’s hurtful. If he’s going to be unhappy either way, and order in either way, I may as well reclaim a small bit of my own autonomy by not even bothering to cook for him.
Similarly, often I’ll stay up with the DC because I find him so utterly disinterest in my trivial SAHM chat in the evenings, it’s hurtful. Sometimes he will be lovely and affectionate. Sometimes, I’m boring, he’s had a tough day at work, he doesn’t want to talk to me, everything I do is wrong or irritating. I find it so stressful to know which one I’ll get any given evening, it’s just easier on myself to stay up and try to avoid it.
I know I’m probably not doing the right thing by avoiding these things but i just feel unable to win any discussion with him, so I stay quiet. It might be that your wife is also feeling insecure or insufficient and protecting herself.