This doesn't hold up to scrutiny, since the opposite situation would also occur. People are also nearly 3 times as like for all of your female bosses to have be

This doesn't hold up to scrutiny, since the opposite situation would also occur. People are also nearly 3 times as like for all of your female bosses to have been good, and exclusively had bad male bosses. If fact, if 10% of bosses are awful then there will be far more people who have exclusively had good female bosses than bad female bosses.