No motivation

How do you do it? We have two 7 year olds and a 2 month old. I have zero motivation to do anything. Don’t want to do the dishes.. don’t want to do the laundry.. I don’t cook dinner until my husband gets home so he can take the baby, and he doesn’t get home until 8pm sometimes. This makes him mad because he wants dinner on the table when he gets done.. it’s just really hard because the baby always gets fussy around the time he’s on his way home from work and she won’t let me put her down. What’s wrong with me? My husband is fed up with it. He’s told me, “If you worked all damn day and I had to stay home and take care of the kids, I would make sure dinner was done and you wouldn’t have to do shit! Nothing, but get a shower, eat, and chill out with the kids.” We argue constantly because of it. I just absolutely cannot bring myself to be this perfect 50’s wife. I don’t know what to do. Im not depressed, I think it’s just laziness.. but I don’t know how to snap out of it. Im tired of being a piece of shit. My husband told me yesterday that he knew having a baby would be too overwhelming for me.. I have terrible anxiety, I also have attention deficit disorder and PTSD.. he said it’s too much for me.. he’ll watch me trying to cook with just our two 7 year olds and I look like a hot mess and get too worked up. I really didn’t think it was that bad.. maybe I just get too anxious that it’s not gonna be done right? I’m a perfectionist and I’m really hard on myself, so maybe I’ve just given up before I can even start. I really don’t know how to push myself to be better. 😔 someone please give some uplifting advice. I’m ruining my marriage. ☹️

Edit* He has taken care of the kids and cooked and cleaned, while I did nothing.. but that’s only on his days off.. he usually leaves a mess the night before he has to go back to work. Pots and pans left on the stove with food in them, plates left out with food on them, sink full of dishes, clothes laying around, coffee on the counter, coffee cups on the counter, sugar bag still left out, dirty bottles left out.. like that’s overwhelming for me. He tells me he can do it, so I just gotta get a routine, but I can’t. I can’t keep up with everything. I’m not a “routine” person. I’ve told him I’ve put applications in for jobs, but then he tells me, “If you’re overwhelmed now, how do you think you’re gonna be with taking the kids to school, finding daycare for the baby, and what job is gonna work around your schedule?” It’s just really discouraging and I feel like I’m stuck in a rut.