I don't think there is an agenda, but design by committee has gotten to the point where it does look like there is one. If you are hell bent on checking the same set of was-well-received-before boxes in every piece of schlock you pump out, people reasonably start to believe that checking boxes is the point. From there any checkbox that doesn't align with viewer's world view is perceived as propaganda.
Assume that I have no real reference point for what you're talking about. What sort of things, specifically, are you noticing?
Violence. Extreme right.
I searched for Dracula, got documentaries about nazis.
I mean, what are said documentaries about the nazis like? Are they presenting an uncritical viewpoint? I don't think I've ever seen a documentary about the nazis not include the context of all the horrible shit they did
Not OP. They're pushing an agenda is the general criticism. E.g. I'm all for them not excluding minorities. If the show does good, it does good. It's a universal unassailable good/win. But when they want to enforce quotas and promoting DEI content synthetically and unnaturally, then they've crossed a line.
And there it is. Lemme guess, you lost your shit when LOTR included a black elf, right?