"Tech bro" isn't just a generic reference to tech founders. It refers to a particular negative stereotype of a person, usually male, who works in tech and subscribes to "bro culture." Bro culture itself usually comes from fraternity culture (as in "frat bro") and it's often associated with misogynist beliefs.
This is literally like saying "If refers to a particular negative stereotype of a person, usually from a poor neighbour hood, usually black, usually without a father" and ascribing any kind of prejudice to it. Is this seriously the kind of discussion you want to be having?
