Two things that get me about this one:

1) Everyone saying "can't believe people are saying you're an asshole when if the genders were reversed it'd be a universal NTA" but all the top comments are already NTA. Y'all already unanimously agree on this, quit jerking each other off over how mysandrist reddit supposedly is.

2) Typical bullcrap situation where AITA decides what's fair based on OP's opinion. How would you possibly know the equivalent number of hours worked and who really is doing more childcare? Individuals have different physical limits and there's probably no solution that's 100% fair. They have to solve it within their own relationship.

Bonus: OP adds sympathetic details in the comments to shift the narrative

No one is even calling her an asshole 😐