Astitchintime
What a miserable old bugger he is!
I would not be cooking his dinner and clearing away after he leaves the table…….in fact I would be encouraging his to take an active part in meal planning and preparation as well as doing the food shopping. There’s no guarantee that he will never be on his own………how will he cope without the basic skills in life?
As for going out, do was a pp said, join WI and/or u3a and broaden your horizons by yourself, for yourself. You are not his housekeeper. In your position I would be going out for the day, even taking the service bus to the next town would be an excursion and a change for you. Leave him to his own devices for a few hours OP, his belly will find his brain.
A few years back, I decided to let DH cook (or take me out or otherwise provide the food) a couple of nights a week. We were both working full-time & I had previously been a "weekend commuter" for a few years, during which time DH bought a whole library of cookbooks & became a good cook, cooking for himself in the week.
It sounds easy to say "don't cook for him" but on his cooking nights I would remind him when he's cooking at the beginning of the week, then we would get home & we would wait, & wait - about 9 oclock he would say "I'd better get something" & go to the supermarket to get a stir-fry or to the takeaway (even takeaway, I didn't get a choice, I had what he decided to order for me)
This despite him being a bit disgruntled if his dinner wasn't on the table at 6.30 on the nights I was cooking.
It seems wasteful to me to cook & eat seperately, especially as I cook from scratch & wouldn't want to live off beans on toast. So we eventually went back to me cooking all the time.
It is easy to say, don't cook or don't do this, that, the other but if you have a stubborn (manipulative?) partner, it's not possible to change their behaviour just by being assertive.
I think the OP's partner is mean as well as boring - but maybe he's finding changed circumstances difficult, as I can't believe he was this nasty throughout their marriage. Maybe he'll come to terms with her retirement. If not, definitely leave.