I think you are confusing him with someone who gives a damn. Have been here myself.
This has been an issue since we first moved in together. When I failed to get anywhere initially, I lowered my standards and we both ran round like headless chickens for 2 hours before visitors arrived (very very low standards obviously, as it was a 1 bed flat!). Once DCs started arriving, this strategy didn't work anymore as when do you get an uninterupted block of time just when you need it? I very quickly realised that he saw all DSs stuff as 'mine'.
Since then I have tried:
Doing nothing. Result, very untidy house, embarrassed to let anyone in. Feel it reflects on me even if it shouldn't.
Talking. The 'I'm not happy' approach, the 'how can we sort it out' approach, the 'we need to look at the house as a business' approach, the 'I'm fucking not happy' approach, the 'what the bloody hell are we going to do about this' approach, the 'these are the jobs to be done, how shall we share them out' approach. You name it, I tried it. Result, no change.
Cleaner. But guess who had to organise that?
Arguments he's used include: you mind more (actually untrue), I don't see it (ditto), I don't know what to do, I don't like doing it (really
, well I just luurve cleaning myself, not), you do it so much better etc etc. The really shocking thing is that I always said my DCs would do more than I did as I think it's important to contribute but of course they don't as his behaviour reinforces the sense that it's 'my job'.
I have been a SAHM for lots of this time, so I haven't even been looking for shared responsibility, just the sense that we're in it together.
Quite shocked that it has taken me 45 years to realise that actions speak louder than words.
As I said on another thread:
Reasonable people act reasonably, listen if you are unhappy and try to change things for the good of everyone.
Unreasonable people don't.
I wish I'd seen this as the issue it really was right back at the beginning but then I thought it seemed a silly thing to be unable to sort out.
He's now an ex and this, on some level, lay at the root of if all - his sense of entitlement, superiority, sense that his needs were more important than mine and that I was there for his benefit.
Since he left, I have been shocked by how much easier it is to keep the house clean and tidy. The DCs are now helping more though have to be retrained after spending time with him. His house is awful, to the point that even the DCs comment but that is, after all, his choice.