There is just a big market for "X great person of the past was actually awful" and "what you learned in school is actually a conspiracy". That these things get spread like wildfire whenever they are brought up, because some people thinks it make them seem smarter I assume. They also drop all introspection or skepticism about it. I would put "Feynman is actually awful" in the same bucket as the "Mercator project is a racist conspiracy" (No one owns a globe apparently) or the multitude of "actually x woman is responsible for scientific advancement, not the man" stories that get spread around. They all fail at any real analysis.