What you just described is the definition of discrimination, not racism or sexism. These words have meanings and you can look them up. Saying it's racist and sexist is just a disingenuous way to shore up drama when a more accurate (but less provocative) term is available.
> sexism > noun sex·ism \ ˈsek-ˌsi-zəm \ > 1 : prejudice or discrimination based on sex; especially : discrimination against women
> racism > noun rac·ism \ ˈrā-ˌsi-zəm also -ˌshi- \ > 3 : racial prejudice or discrimination
Sexism is defined as discrimination based on gender or biological sex.
Both are well defined terms in English both in dictionaries and general usage. Stop trying to play games with words and start explaining why you think racism and sexism are ok.
The truth is this: To have equality of outcome across race and gender in entrepreneurship is impossible. It's unclear why anyone at all is interested in taking extremely high risk positions as founders of start ups relying on fast growth and with a small amount of burn; to segment that group by racial and gender identity is to shame and belittle the ones deemed "to hold the power". And when they cry out that they are being discriminated against on the basis of race, you are one step ahead of them: Your convenient re-definition of racism to be an act only committed by those of power denies the shamed their rightful defense.