The definition of “Tech bros” is “tech people you don’t like”. There’s no agreed upon definition (just like how people disagree about what is/isn’t a “grift”) because it’s not meant to be descriptive, it’s a rhetorical device.

Saying we don't like someone because we deem them to be a tech bro, is indeed a circular argument.

But saying we don't like someone that calls themself a tech bro? Well they had it coming.

No, this is too dismissive. There was a large shift in the culture of people over the last decade or so as the bay area money printers started printing faster than finance firms were printing. Eg tech money attracted a culture of people wed normally label “finance bros”. Patrick Bateman types but without the explicit murder. Status, money, often born outstandingly privileged.

This is the tech bro people speak of. It is that psychopathic desire for status at all costs which sadly is learned, emulated, and exalted. Ironically, yc is the poster child for breeding this culture over the last 8 or so years and the place it is most often complained about outside of reddit ofc.