There's two potential solutions and which works depends on the individual infection.
The first option is when the infection is still in its infancy. Then it can be fought on the beaches and in the trenches. This typically is what happens in vidya. The fanbase can rally to oppose the threat and can warn one another about it. They may not be able to necessarily stop it, but they can cause so many problems and so much frustration that it helps guarantee that the thing fails, and that helps ensure that such shit won't be attempted again. More rarely, the community rallies to expunge the threat (this is what happened in 40K), and manages to fight them from the barricades. Other devs won't be intimidated and won't back down. They will find themselves supported and can count on a devoted fanbase who will buy their shit in the future.
In cases where the infection is terminal, like Hollywood, there's nothing you can do: the host can't be saved. What you can do is refuse to be party to it. Financially this crap sells like sno-cones made from nuclear slag, to the point where even shit that would be a financial no-brainer has been an economic dumpster-fire. They can't even pretend to be appealing to anyone because nobody wants this shit. China, the biggest market for movies, fucking hates woke movies. Every single Marvel comic done by the woke crowd has been a financial failure likable to a biblical plague. Sooner or later, the fact that this is market poison is going to be sinking in deeper and deeper. In some areas, it already has.
All of this begs the question: Why do they do it, if they know it's going to fail? Key to the above is that SJWs believe that customers, by definition, should have no rights, and that the consumerbase ergo must concede to their demands. I'm mostly sure that this stems from the fact that most are communists and don't know how to economics, but the overarching issue is that for them, ruining a franchise like this is win-win: If it does well anyway, it proves the ideology right, and if it fails, it keeps the franchise out of the hands of those loathsome customers.
In the end, economic self-interest will bring an end to this sort of entryistic behavior, but it's going to get worse before it gets better.
