Wallissimpson If you aren't happy, why tolerate it?
Do you honestly think it is as simple as one man acting in isolation on his own and one woman acting in isolation "putting up with it". 
Have you not considered the wider cultural norms which contribute to situations like on the blog OP posted.
EG we are in an world where a father is praised for "babysitting" "oh isn't he good with the baby" "changing nappies!" and a woman is seen as "unable to cope" if "she needs help from the babies father" etc.
A feminist analysis looks at these wider cultural concerns.
Is it really easy for a woman to leave such a man? Much easier than in the past - divorce/benefits for single mothers/ability to have own bank account/own property etc.
However what does our culture say about this situation "put up or shut up" "that's just men isn't it" "feckless single mothers" "a baby needs it's father".
Why does the father do so little to help - is he modelling his father?
Personally, for me when I think about all the above together as a system I think of this as being The Patriarchy.
Take a look at Ann Oakley's website (go to Publications - Non fiction - second one down Housewife).
In that extract - Is it really that woman's fault the situation she is in. (NB I am not saying it is just her husband's fault although he could stop going to to the pub all day and bloody well share the household tasks - more that it is is the cultural attitude that allows that scenario to continue).
This is the same culture which led to:
a) My father not sharing household and childcare tasks when on holidays or on Sundays - other days there really was a period of time where he worked outside the home too many hours to do so.
b) My FIL saying recently about a dishwasher (argument about how it should be loaded
) - MIL says "I don't know why you don't leave my dishwasher to me - I managed perfectly well before you retired" (note due to their set up she thinks of it as "hers") - then FIL saying "it's my dishwasher because my money bought it"
- uh actually my MIL did work (SAHM, then part time then WAHM - in a much lower paid job that FIL - and of course her SAHMing allowed him to work in his career which involved stints working abroad!).