Me and DH have only been married and living together for 5 months. I have two dc (13 and 15) here most of the time bar eow. Dh has dss (8) who is here 40%.
Since he moved in his outgoings have gone down and we are 50/50 - I work ft as a social worker with a very high risk case load and dh has his own engineering business (both stressful jobs but different).
Dh parenting is a bit shit sometimes and he guilt parented. Dh understands that that's not actually the type of dad he wants to be and is working on it. However, I feel he has resentment towards me for picking this up after we married and projects onto my dc.
Dh has found it quite hard living with teenagers, they are emotionally healthy and adjusted teenagers with no attachment issues and both are doing well at school and have interests outside. Dss has a few challenges but is mostly well behaved like my dc are mostly well behaved.
My dh has started leaving more and more housework to me alongside cooking ect and has started being critical of me. I feel he's projecting as he isn't doing what he's supposed to be. He also has his own kitchen cupboard with his and his sons food in. This is because twice my dd (15) used the last of the Nutella and didn't tell him so dss couldn't have his spoonful of Nutella in his morning porridge. We are quite different in that I buy my dcs treat food like Nutella and when its gone its gone until I next do a big shop. Dh likes to be more organised than that. But I hate that he has a seperate cupboard just for him and dss, its divisive imo.
I also need to lose a stone so I've said from now on I'm not cooking for him or washing his clothes as its not appreciated. I've arranged another cupboard for my dcs food, they're more than capable of making basic meals for themselves and they were a bit 
about him and dss having a cupboard full of their food. I'm also not doing his washing anymore as he doesn't do his jobs around the house after we decided when he moved in who's doing what. He's now bought a washing basket for himself 
. He's not very happy with me and is saying I'm taking things too far and I'm unreasonable as he needs to know what food his dss has and needs his own cupboard to do that. I think if I can go back to only washing for 3 people and not cooking most days I'm on a winner. Why should I pick up his slack. He's now saying that he's not going to buy us a new family car since we're living so seperate and is saying he's also annoyed about paying 50/50 on bills (even though his outgoings decreased by almost 50% moving in with me).
So AIBU to continue the seperate theme, why can't my dc and me also have seperate cupboards? Or am I being petty?