In the original definition of feminism, superiority was never even mentioned. It was (and should still be) about giving women the same rights as men and giving them the possibility to live a life that isn't 'controlled' by a man. (e.g husband)
Some radical feminists claim that 'men are all horrible and a burden' and totally alienate people from the real definition of feminism. People then get a distorted image of feminism and associate everyone who wants EQUALITY between the two sexes to a radical movement.
'Feminism' may seem to have another meaning now but the official definition (in dictionaries!) hasn't changed until now and it is about equality.
I would also be angry if I came across such pictures, which seem a bit contradictory anyway.