Caj, I know exactly how you feel and what you are going through.
My partner doesn't even know how to put things in the dustbin. He will drink a can of coke or eat a chocolate bar and the wrapper or can will just stay wherever he leaves it. At this moment, he has 30 empty coke cans in his office, with an array of other rubbish. If I go away for the weekend, I can guarantee, I'll come back to the same washing up that was left in the sink when I went.
I spend my time nagging and pleading and he promises to improve, but so far hasn't. It really gets me down and I feel so depressed at times. Before I moved in with him, I lived alone in my flat and kept it clean and tidy. The house we live in together, looks like a pigsty.
He never does anything around the house either, although he does know how to use the washer and dryer and will change the sheets ocassionally and mow the lawn, but that's about it. I think he feels as he is the main breadwinner and I just work 20 hours per week, it should be my place to take care of the house.
Other than that, I'm treated well, but also resent being forced to take the place of his mother and like you, feel resentful towards him. It also affects our sexlife, afterall, who want's to get intimate with their "son".