It's not that boy children don't like female Heroes, but the authors of these characters write these characters in such a Way that they're mean and horrible to little boy characters in Film, Comics, media, and even tv shows. That is why Boys show no interest in female Heroes because of the Horribleness of those characters towards The Boys.
For example in The flash tv series When a little boy complicated "Black Canary" on her Strength, she yelled him "GO AWAY!"
In madame web When a boy made a Thank you card to "Madam Web" for Saving his life.. she rejected the Thank you card. And Dismissed the child in a Cruel fashion.