I don’t think it’s motherhood that’s the problem.
it’s that she’s discovering just how painfully dull she is: all she has is her own narcissism. She doesn’t have any other interests. And the parts of motherhood she focuses on are the parts about herself: glamour shots of her breastfeeding, statues of her own naked body, talking about how HER life has changed.
she’s not pouring herself into her children and their development. She doesn’t share helpful information or signpost others to support about feeding, mental health, etc.
it’s just All About Ashley.
and as a narcissist mother she cannot bear to have others need her this much.
She doesn’t even want to be a better friend or partner, she wants those relationships to boost her own ego.
she also sees herself as totally superior to other mums. So the things she’d need to do to get some of that independence - have a routine, express milk, practise the bottle, make plans in advance - she doesn’t want to do.