The problem is that when I look in a dictionary, it says that racism is prejudice or discrimination based on race, and that sexism is prejudice or discrimination based on sex or gender. And that's how lots of people use those words. The Bustle article you linked to even says, "Sure, men might experience discrimination, bullying or even disparagement of their gender," which is literally sexism.
But you, and others like you, have added "institutional or systemic" to the definitions. And then you tell other people that they're wrong if they use those words without that implicit addition.
What I call racism you call prejudice based on race (which is the dictionary definition of racism). And what you call racism I call systemic racism. I've met plenty of people who will readily acknowledge that systemic racism and sexism exist and are important problems. They'll also readily acknowledge that white men in America cannot be victims of systemic sexism and racism (although the patriarchal system is detrimental to men in various ways, but that's another discussion). They just use slightly different language than you do.
Trying to impose a new definition on words that are thoroughly entrenched in our language makes you come across as an asshat and makes people stop listening. Maybe this whole conversation would go better if you didn't tell an enormous swath of the country that their consensus definitions are wrong and just resigned yourself to putting the word "systemic" in front.
