I watched her shows and wouldn’t say they were focused on anything except the recipes, suggesting they were about her clothes or lipstick is odd.
The whole concept of TV shows being ‘cancelled’ is incorrect, shows get commissioned for that series, that series is made then a decision is made on whether to make another one, not making another one doesn’t mean it’s been cancelled because very few programmes are ongoing.
The Daily Mail hate the BBC so I’d take everything written with a pinch of salt anyway, I’m sure she’s upset she hasn’t got another series commissioned but lots of presenters move around channels.
She’d be better putting her energy into pitching ideas to other channels, doing this won’t do her any favours with other commissioners if she did decide to go down that route.
Most TV chefs don’t rely solely on the programmes, they have restaurants, other projects like she’s done her cook books, nobody is guaranteed a show without a good concept to make it work.