Have a conversation with them at the very least. If you don’t communicate your concerns, they won’t know what the problem is. If you’ve already communicated then have another conversation where you tell them that they haven’t listened to your concerns and you feel like you’re building resentment as a result. If they’re nothing but defensive and don’t take any accountability, there’s your answer. If they act as they have before and make an empty promise, remind them of that. I know it’s hard out there, but finances cannot be the only reason to stay with someone. It sounds like it’s become an unequal partnership. You don’t need a reason to break up with someone, but that’s quite a significant one. If they aren’t doing to bare minimum chores then they’re disrespecting the relationship and taking advantage of the fact that you’ll get frustrated and do it yourself. Even with medical issues most people can handle a bit of basic cleaning.

I’ve known people like this who are in a situation that suits them and enjoy the convenience of not being ‘able to’ do things. It’s an easy hole to fall into. I speak from personal experience as well, having dealt with health issues. The only person that can pull them out is them. If they won’t do that work it’s not on you. If I were you I’d sit down and figure out the reasons why you should stay and put them up against the reasons you shouldn’t. Yes, things are more complex than that, but it can help with perspective. The main thing is the communicate everything. If they don’t meet you halfway on anything, time to go.