AITAH for not doing more housework?

My wife and I have been together 3 years, married 1. We have a newborn son now but for the last year or so she's been non-stop complaining about me not doing enough around the house.

Background - She's a teacher (on maternity leave now) in a nice air conditioned office for much of the time. I'm a carpet/upholstery cleaner and have worked my nuts off doing manual labour for 6 days a week over 10 years now - which has wrecked most of my joints and given me degenerative disk disease but I still crack on to pay the bills and save for us (she saves very little).

I just feel like given how hard I work cleaning other people's homes every day and walking our dog I should be given a bit more leniency at home. When I've had an entire school, hotel or office to clean and come home she'll be losing her shit at me for something like not emptying the dishwasher or bringing the washing basket down and it just seems so God damn trivial compared to what I've actually done that day. I want home to be a place of rest and a sanctuary from the physical pain I'm in at work. I'm sure if our daily calorie expenditure were compared mine would be 10x hers and yet she's making out I'm lazy. Which I find so ungrateful. Fair enough if I was just an admin worker like she essentially is.

I know she needs help with our new son now and that's fine but this moaning about housework has been going on for a while now.

Anyway I'd appreciate your thoughts, thanks.