Hi.
I wanted to comment as I have been where your husband was.
Went to doctor for something minor, 35 yrs old and diagnosed kidney failure, some months on dialysis and then a transplant. I should add to poster above, for me, this whole thing was over 2 years but if he 'crashed' into dialysis they would have escalated the timescales
On the health front. It is shocking, life changing and you have to get your head around potentially a life limiting illness (transplants don't last forever and at this age I'm fully expecting to need another). The recovery from a transplant is brutal. Tiredness like you've never known, new daily drugs with some horrible side effects and yet the world keeps on turning and everyone gets on with normality around you.
My husband really struggled to move from the role of husband to carer so early in our marriage and I relied on him for so much. We didn't have kids at the time but I know I wouldn't have been able to manage them as well. We got a cleaner to help around the house and that took the pressure off.
The shift in our marriage was significant. I was tired in the evenings, didn't want to socialise etc etc. But we had a good and strong foundation. Ive no idea how we would have coped if we were already rocky.
All in all I reckon post transplant it took me a year to get emotionally, mentally and physically better from the transplant (almost back to 'normal').
Here's the BUT... I couldn't have been more appreciative of my husband. I told him, was kind to him, thanked him and tried to do small things to show how valued he was. I honestly couldn't have coped without him. So while the above is to add some context, I don't think it excuses his attitude to you!
I can only suggest that perhaps he is really struggling with this all and is taking it out on you (again, not to excuse it)
YANBU to want to be appreciated for what you do. I don't think physically you can expect more from him, but kindness costs nothing.