There’s no victim blaming if there’s not a victim and there’s no victim if adults are responsible for their own decisions and performed due diligence to educate themselves about the company before investing. So Fox having always been terrible is at the core of the issue here. They have always promoted crazy-ass conspiracy theories and it has always been profitable for them up until now, in fact I believe they were the highest rated cable “news” network for many years. If they followed a formula that always worked, they had no reason (arguably) to believe it wouldn’t continue to work. In fact by changing a proven profitable formula you could argue they weren’t performing their duties to continue to produce returns on investment.
But I’m not sure I can continue to have this conversation because if you’re going to start using short-cut terms like "victim-blaming without making arguments to back yourself up, there’s no discussion to be had.