Ok, so when they call you with a list of concerns you just address each one in turn calmly and politely.
Eg “We appreciate your concern but there’s no need. The children are healthy and happy and doing well. Yes, I agree that children can be easily damaged but putting firm boundaries in place and being consistent about expected behaviour isn’t damaging at all. Quite the contrary it’s good for children to feel secure within clear boundaries. Regarding not interrupting, teaching children good manners is a wonderful gift and will stand them in good stead all their lives. Learning to wait and to put other people first sometimes are good healthy things to learn.
Yes X is a fussy eater. It’s fairly common for children to be fussy. We are dealing with it in our own way, he/she will grow out of it in time.
Don’t argue. There isn’t anything to argue about, these are your children, you are in charge, your parents don’t get a say.
As for stopping holiday money. That’s a control mechanism. It’s manipulative. It’s emotional blackmail. The only way to effectively deal with it is not to play the game
Better to miss a holiday than to be miserable every time your parents visit.
Better to miss a holiday than send your children mixed messages about who is in charge.
The first time we made a key decision for our D.C. that my PILs really disagreed with they stopped speaking to us for two weeks.
It was meant to be a punishment but we just cheerfully let them get on with it.
They got a bit of a shock, the natural consequence of not speaking to us was that they didn’t see our very young D.C.
It hadn’t occurred to them that the balance of power had shifted after the children were born.
After two weeks they got in touch and asked to visit, never mentioning the argument. We politely said that of course they could visit. Nothing more on the subject has been said but they now understand that they are not in charge of our family.
They still step over the boundaries in small ways but they are very careful not to fall out with us.
You don’t need to fall out with your parents to stand up to them.
The consequences of falling out with you are much worse for them.