For example, you say that "I hear vastly more about the three male cofounders than I do about the one female cofounder."

I believe you - you hear what you hear. That said, I've been around HN for a while, yet I had to look up who the other male cofounders even were. Doing a search by their names, Jessica has easily three times more submissions about her than either Trevor or Robert.

And so when our perception is so different, many people will simply incorrectly assume dishonesty, because that's easier to picture. I find it unfortunate, but I don't think it can be avoided unless one's willing to be very detailed about the priors that led one to a certain conclusion rather than just state it and hope people will see it the same way.