This thread is a bit silly surely no one who ever watches TV in 2023 is deluded enough to think that this kind of show isn't based around 'characters', 'scripts' 'plots' and 'settings' almost as much as a drama, even when it's 'two mildly eccentric real people buy a chateau, renovate it, and run it as a business'? Look at the way the producers always 'script' in some artificial source of tension to give it some pace like having to finish the initial renovation in time to host their own wedding, which was only 'necessary' for the 'plot', when in fact people who had been together for years and had two children and were busy could easily have left it another month, or another year.
Dick Strawbridge, far from being some ordinary guy who just lurched into TV via buying a chateau, has a huge amount of varied TV experience, including several previous 'reality TV' stints with family, and even Angel, who doesn't, has a consciously-crafted wacky-vintage persona which suggests a certain savviness about popular appeal and being in the public eye, and a previous business that relied on selling a quite ordinary service by putting a particular vintage 'spin' on it.
Both are 'acting' to an extent onscreen -- he's wacky-moustached Colonel DIY, she's flame-haired kimono-clad designer. It's perfectly possible that in non-filming periods when they're home alone, Angel has a brown flicky blowdry and dresses in Next.
Perhaps they are difficult to work with. Perhaps the producers didn't like the fact that the 'actors' flexed their muscles beyond the project, and felt able to make demands for more money, more power etc. Who knows?