I think it is changing now as well and obesity rates increasing in those countries. Years ago, take aways weren't as much of a thing in some countries, but they are now and you can definitely see a lot more really overweight people, including kids.the interesting thing about good vs bad food is that Europeans who seemingly have little issues with obesity especially among kids is that they dont eat notoriously healthily either (besides maybe the med). The Germans certainly don’t. It’s mostly processed meat, bread and cheese from my experience. The noticeable difference I would say is that they have significantly (and from my own experiences of living there I mean significantly!!!) less fast food restaurants and take away outlets than we do.
Obviously not every country will have the same diet but, while they eat a lot of processed meats etc like you said, I find there is a lot less deep fried stuff as well and also only one heavy meal per day, while e.g. in the UK people can easily have a fry up for breakfast, chips for lunch, and a takeaway for dinner. Also fruit and veg is really not as good as in some other countries in Europe