I'll save you the effort. He's disabled. He can't cook because he's disabled.
You've assumed that everybody is physically able to do something - which can be pretty offensive to people who do have disabilities that mean for all the will in the world, they aren't going to be able to take a roasting tray from an oven, drain a saucepan, chop any vegetable or open a tin.
There are also people who are disabled who aren't able to follow instructions in sequence or suffer from complete overwhelm at a list of things to do or assumed knowledge of the multiple steps that 'drain the saucepan' entails. Even though they are perfectly capable of reading it, the words don't translate to actions.
The OP's boyfriend may be the type of person who says horrible stuff like 'Why would I bark myself when I've got a dog to do it?'. But he might not be, he might be one of those people who genuinely can't get further than water in kettle, kettle on, kettle boil, lid off, water in, leave 3 minutes, stir, add chilli sauce - which is already an eight step process if you leave out the 'get fork from drawer' or 'go back to yesterday, turn the hot tap on, run the dirty fork under the water, pick up a dish sponge that's clean and use it to remove any bits of food, rinse the fork, pick up a clean teatowel that you washed and dried the day before that, wipe the fork dry, open the drawer that cutlery goes into, place fork into the section that forks go into, close the drawer then flash forward to today, open drawer and take clean fork out, close drawer, take fork to where the Pot Noodle is once you've added water to it, wait three minutes from adding boiling water and stir it so that the noodles move around and are evenly coated in the soup mix without splashing it over the side or scalding your hand...'