Frankly, the man is bedridden, which is hard on anyone, so it seems a shame he can't enoy his food.
It is hard on you too and listening to snide comments can't be making it any easier.
So quite apart from the vegetarian - meat-eater issue, I think there are other things you and he need to talk to each other about. The pair of you need to discuss the following:
You don't seem to like cooking - fair enough, a lot of people don't. You husband seems to have enjoyed it, but now he cannot do it.
I would think buying ready made meals is far too expensive, and it assuredly is not healthy. But it might be the best alternative, as I assume you are doing a lot else for him apart from being head cook and bottle washer.
If you want to go on cooking, you will need to get your husband to dictate or write out one or two of his easier recipes, step for step and follow them.
And he needs to confine himself to making helpful remarks with no trace of sarcasm.
This doesn't mean he cannot mention that something you served lacked salt, flavour or the like, but he needs to do so politely.
None of us have ever become good at something if we were told all the time that our attempts were no good.
If you get really stuck, I am sure you can find a youtube video that demonstrates the process.
You could also look for a school cookery book and use it, as I get the feeling that cooking has never either interested you or been something you felt good at.
If you can make good eggs and chips then you can use both a frying pan and a chip pan, so make him a chop in the frying pan, following the instructions in the school cookery book, if you really do not know how to do it, which I find hard to believe, and chips in the chip pan, or boil potatoes for him.
Chicken nuggets, chicken drumsticks etc. can be cooked in the chip pan, you know.
What sort of meals do you eat? A compromise could well entail him eating your meals once or twice a week, and you making one thing for yourself and something else for him on another two, vegetable soup on the fifth day, and some other vegetable dishes on the last two days with cold sliced meat for him.
I am sure you would have thought of this yourself if you weren't worn to a frazzle with a bedridden husband, all the housework, repairs and so on to attend to.