Going through this myself as well. Sadly - divorce shouldn't be such a devastating process as it is (in the US).

Child support statues are incredibly flawed in certain states -- NYS in particular -- and lead to the process being more drawn out than it needs to be. NYS doesn't take child custody splits into account when it comes to setting child support, and as a result the "high earner" pays a pro-rata share based on relative income to the "low earner", irrespective of any custody arrangement.

[Edit to add] Exacerbating this is that it's generally cheaper to reach a settlement, instead of trying to advocate to actually fix the laws / statutes.