There are some inconvenient truths for you both to face up to.
One is- yes, your life is easier and more pleasant than his. Actually, that is not a criticism. You planned it intelligently to be this way. I would demonstrate to him what you would need to earn pretax in order to pay for cleaning etc, and still have left what you currently earn. I don't think you can fairly include the costs of childcare, when your DC are so old, but there may be some other costs of that kind you could include. That is your effective wage, so far as the family is concerned. Could you plausibly earn more than that full-time? Do you have the right qualifications to do that?
Secondly- it sounds as if you are slightly off balance, if there were only beans to eat. YABU not to deal with this. It's one thing contributing equally in a way that he undervalues and needs to have explained to him. It's another thing if he has to work flat out and still has a lousy lifestyle at the end of it. It might not be so unreasonable that you should up the effort you put into your business so you make a bit more, or take on a few extra hours at something else to improve the budget if the business isn't doing so well. Or maybe you need to take an honest look at how you spend this money.
Thirdly- he likes working hard and it makes him feel validated. Nt everyone feels that way. He needs to recognise that he will be grateful in later life that his kids are OK and you still have some friends and hobbies, because if both parents followed his pattern, it wouldn't be like that.
Lastly, it can be harsh being the main breadwinner. It feels as if the whole structure is on your shoulders forever. Even if he loves to work, it can be oppressive thinking nobody else is going to pick up some of that load, ever. Because whatever we may all feel about parenting being valuable, the fact is that parenting doesn't buy food or pay rent. Working and earning do that.