I don't think that believing in gender equality is or should be a controversal agenda on MNet. I don't think that it adds anything to every relationship discussion for each poster who isn't a MRA to begin each comment: "I believe women are entitled to the same respect, happiness and consideration as men."
AF/EF's comments can basically be summed up as "hello, you sound unhappy. Your happiness actually matters. You can only change your actions not your Ps and therefore you cannot save a relationship single handedly. IME your P is unlikely to change their actions because they seem to be happy with the situation and from what you have said, are unwilling/unable to change. So you might want to LTB to achieve happiness" With a whole lot of experience and good sense thrown in.
I think its quite aggressive to instead of just posting your opinion on a subject, to actually try and shut down those who disagree with you by attacking their right to comment with their opinion. A "feminist" agenda is simply that women matter as much as men. If you think AF/EF has a different agenda than that (female supremacy/everyone being single or lesbian/whatever it is you are reading into her posts) then please realise that is not 'feminism', whatever the DailyMail has told you feminism is.
Back to the relationship at hand...
It's difficult when someone is ill. Especially when it isn't necessarily clear how much is a lack of capability and how much a lack of willingness. Some advice from his HCPs about his condition might be helpful to you.
You also need to think about what you are prepared to live with, whatever the cause of his behaviour. If the relationship is otherwise good and its the practical stuff that gets you down then you can look at ways of helping him realise your expectations if he is able to do some things, by working out as a household what tasks need doing and getting him to work out what things he can do reguarly and what things he can do when he's feeling more able.
How is he coming along with the novel? Does he manage to write to a level of quantity and quality that may make this a resonable way for him to spend his more productive hours, or should it be relagated from the level of a profession (in terms of hours devoted to it) to the level of a hobby/theraputic aid?