Whether or not Merck "did some fraudulent science," I'd need a better source than RFKJr to believe it. Preferably a scientific source.
Here's some scientific sources on Gardasil, mostly after its introduction to the US market:
https://scholar.google.com/scholar?q=safety+efficacy+quadriv...
RFK Jr is not a source. You do not have to like him, only to verify what he says.