We both work. Him 4 days a week full time, me 3 days a week part time. I try and cook as much as possible fresh, homecooked, hot meals for DP and the children 99% of the time.
Last night I started work at 4.30pm and finished at 10.00. I was busy during the day so didn't have time to cook anything or put it in the slowccoker and to be honest I do it most days and like the odd evening off.
DP feeds the kids crap when I haven't made anything which is fine, it's not all the time and i'm sure the children love a bit of rubbish now and again.
He done them a 'buffett' last night, which is one of his favourites and consists on bits and peices from the fridge and whatever he can lay his hands on which requires little or no cooking and no thought.
I came down this morning to find a WHOLE cooked pizza in the fridge, obviously he's done too much again, he often does this, Now, we have this often and it inevitably ends up in the bin, as it's not very appetising.
However, we are not in a position to throw away food and DP is oblivious to how much shopping actually costs. We are skint, we have just moved into a new house and the credit cards are maxed out and we owe IN laws for brand new furniture, we manage but we are not in a position to throw away food regularly cos he cant be bothered to get up and cook something, instead relying on chips, pizza with chips, pasta and chips 
and chips with chips .
AIBU to cook my children and I a meal tonight and serve him up the damn pizza.
It sounds really trivial I know 'it's just a pizza' well towards the end of the month we are so broke we are often eating storecupboard staples til payday, the pizza would be a luxury. I'm so sick of his attitude to it all