Anecdotally, the system was 50/50 for my sister when she got divorced.
There was definitely no court bias for the mother, which was a surprise given that this is the popular culture stereotype. And child support was purely formula based.
The most annoying thing was domiciliary parent designation, even with 50/50 joint custody, as the domiciliary parent had more decision power which allowed for unnecessary drama.
One thing to note is that all of this is state (and country) specific and states might vary significantly.
There was definitely no court bias for the mother, which was a surprise given that this is the popular culture stereotype. And child support was purely formula based.
The most annoying thing was domiciliary parent designation, even with 50/50 joint custody, as the domiciliary parent had more decision power which allowed for unnecessary drama.
One thing to note is that all of this is state (and country) specific and states might vary significantly.