In most nicely done kitchen/living spaces I've been to and lived, kitchen was partitioned in some way, positioned in a snug, separated by a worktop/breakfast bar from the rest of the space, so it wasn't all exposed.
Honestly, I don't know what is wrong with ventilation in UK houses, but I hadn't even known what cooking smells were(mind, until a house guest decided to fry a fresh herring!) growing up in flats in a city! And we didn't even have a cooker hood, but kitchen/bathroom, and in old apartments (100 years plus) every room has some kind of air brick or like a discreet mini-chimney in the wall with a little screen covering the entrance to it near the ceiling, in the kitchen or bathroom it was likely to have a little extractor fan inside.
That was it! Though open windows were ubiquitous as well, because heating in flats was on 24/7 in the winter, provided to whole neighbourhoods for a fixed price (like having water with no meter). Never any speckle of mould, no smells. Here I have the same as someone else mentioned, if I don't shut the doors if I'm frying or making soup, or anything is in the slow cooker, even with the extractor hood on full blast, everything upstairs will smell of cooking for hours. Interestingly, the smell doesn't stay in the kitchen or travel to the dining room etc, it always goes straight upstairs!
I just thought, our cooker hood is so loud, when it's on you can't have a conversation with anyone anyway, or listen to the radio etc...People with efficient extractor fans in open plan houses, aren't they loud?
We couldn't put a cooker hood up venting outside, it's not on an outside wall, I got the one where I change two circular carbon filters every three months, and wash the metal net thing every week, it does make a big difference to smells and grease build-up, but filters are expensive and it is loud. Thinking about my friend's Victorian house where they did knock a wall down to make that part of the house open plan, and I never noticed any cooking smells, nor does she have a cooker hood!