I found that /r/daddit was full of pictures of dads with infants.
On the other hand, /r/parenting was full of moms desperate because their partners didn't to their part.
It really paints a picture, if you think about it.
It's like how /r/steak is just dudes posting steak pictures, and there is some new cooking sub where it's just women posting food pictures and complaining about their significant others. Women be complaining.
It seems like a safe guess that very few of the moms complaining about their partners on r/parenting are also married to the dads who are posting on r/daddit.