only on page 4, just thought I would share my similar experience
Before DP and i got together, his mum and dad did his washing,ironing, shopping, cleaning, and wait for it made his lunch for him everyday and dropped it off for him. His dad came round EVERYDAY!!! to watch football and drop stuff off.
Before we got engaged, i did a trial of 2 weeks living together, but before i even did that i put things in place to let him know what was expected, as in get a washing machine, buying own food, not ding food, but food you can actually cook.
His parents did not take it well, constantly trying to "help" always asking how is he getting on with doing his washing by himself. 
Constantly showing concern that he would burn down the house if he was cooking
When we had had a new bed delivered, i thought it would be a good bonding session for his dad to help build it when i was out at work. That part was ok, but the fact he then took the washing basket, after being asked not to, and took MY FUCKING CLOTHES! away and washed them. Sounds petty, but they kept saying, we will just help until you get on your feet 
I having been washing my own clothes since i was 14, don't need help now!
So a year on, they don't come round unless invited, the spare keys for the cars are in our house,All his filing is in our house. (wasn't before) DP can cook, clean, do washing, always does the dishes, Can go to the shops with a list and come back with everything on it. he visits once a week, i join him occasionally.
If they try and make him feel like a kid or try and pass un wanted opinions or advice, he calls them on it.
So it can get better, But your DP has to want it.