Network
I watched the movie Network (1976) a while back, which is a near-future dystopian film about what happens when we let journalism get taken over by entertainment and ratings-chasing.
Howard Beale goes from a respected journalist to this red-faced fear-mongering angry shouting head.
… and I don’t think it ages very well, because the thing it predicted came to pass essentially immediately and hasn’t left since, I was born a decade later, I can’t remember an era when news WASN’T like this.