> Nobody would tell a male founder that he wasn't being "level-headed", or tell him to quit, or call him emotional, or anything else that frequently is launched against women.

On that point you're wrong. Just as an example, look at how people responded to Nadim Kobeissi and his own responses to criticism. Nadim is male (the Cryptocat guy). Many of those criticizing him and his responses to technical criticism were female. "not level-headed" would probably be overly mild.