The left sometimes uses those back-stabbing tactics, but right-wingers are more prone to do so because (as I noted) their political and economic ideology is based in zero-sum thinking.
This story is a case of infighting amongst politicians on the right. I wouldn’t bet a nickel against these conservative greedheads and thugs going a year in power before turning on each-other.
There’s plenty of evidence to back up both contentions as more than mere excuses. That’s the “reality-based community” for you, relying on facts.
It’s a sign of ignorance and delusion to equate the relatively powerless left with the establishment elites who’ve spent 40 years cementing the neoliberal globalist consensus that’s helped bring us to this turn.
Whether it’s Il Douche’s supporters or rank-and-file Brexiteers, it’s a mark of their stupidity and ignorance that they completely misidentify the actual elites who have caused them so much economic pain.
The BBC is not a typical private corporation but one that operates under a Royal Charter. It has tens of millions of stakeholders rather than a much small number of shareholders (those who understand that value can be measured in terms other than money know the difference). So no, your scenario is not exactly what you have in that case.