I agree that it's fine to do things out of love for our DC, and if they are happy and grateful, that's all good. However, they need to learn how to do these things and also appreciate that they need to contribute to the household as well. My 19 and 17 year olds definitely don't do a quarter, but they know that it's not my job to pick up and clean after them. DH and I both work full time, they are in holiday from uni and school, whilst I think they need to enjoy these times and be available to spend time with friends, there is no way I'm coming home from work to deal with their breakfast and lunch dishes etc.
They tried also just leaving DHs coffee cup in the side instead of adding it to the dishwasher as it wasn't theirs until They were told that it's disrespectful and that DH does their evening dishes every night.
There is definitely a balance, ours is that they do their own rooms and bathroom and contribute to the laundry and do loads as required, do their own ironing, clear up their own stuff from breakfast and lunch and ad hoc stuff such as running errands and hoovering. They haven't done all this since a particular age but have had things added as they've got older.
No one needs to shout at anyone, that's probably the worst bit of the OP to be honest. It's the attitude that needs sorted most.
Also, anything clean and dry in our house goes into the ironing pile, that doesn't mean it all gets ironed, it just hasn't yet been sorted into who it belongs to and decided if it needs ironed or not. We do iron jeans as it makes them softer, we don't use fabric softener due to allergies and don't tumble dry so I think more needs ironed just for a nicer feel.