You're contradicting yourself quite a lot here, first you said:
When times were tougher we put food shops and uniform on the cc, had to put a new TV on it as dc broke ours.
he did most of the food shops
now you're saying he did the occasional food shop and put a few pairs of shoes/ uniform for the kids on it over the course of 4 years.??
you also said:
When cc hit limit I took over meal planning, budgeting etc.
but now you're saying Before cc was maxed, I was still budgeting ect.
The crux of it is you've both been living beyond your means for years, it's easily done with credit cards, now that you have been forced to live within your means you're managing to do it, but you're both now in debt to your eyeballs, this isn't his problem, this is a family problem that has been built up over the years by both of you, I find it terrible that you're blaming it all on him when the only reason he's got the card in his name is because you're already in debt and have got a terrible credit score.
I don't think you should pay a lump sum off the card, but it would make sense to cover a couple of payments while you work out a plan of action. Assuming you want to stay together, you need to deal with this together, but you don't seem to operate as a team at all?