When you have been with someone a little while do the strangest things annoy u? Would u be irritated by this?

My relatively new boyfriend...who is very sweet and caring and lovely still lives at home with his family at the age of 45!! I have sort of come to terms with this odd situation ...but now other things are starting to niggle greatly...like for instance his brother and he are both working but are incapable of cooking for themselves...they eat tinned potatoes and tinned peas and haslet!!! they are not short of a bob or two but they eat like they are on rations!! they have been cooking for themselves of late as the mother is not well and for the first time they are fending for themselves!!! The mother would not watch the telly inhospital because it was too expensive and neither of her sons offered to pay...they are loaded.... but are so careful about wasting money!! They use hot water bottles instead of having the heating on. They have not decorated their house for probably 30 years and neither of the sons or the father has attempted to do anything. Between them they could have paid someone to do something....I just dont get it??