I really feel for you. It sounds as though you're being hit on all sides: physical health, mental health, relationships, work, and daily life. I personally think all these affect each other and that if you can work on getting one to where you'd like it to be, it may well have a knock-on effect on other areas - or give you enough of a lift to tackle another area.
Focusing on what you asked for advice on, do you think you would actually like to work on your relationship, if your husband was also willing to, and if he was willing to re-balance the domestic load? Or is it definitely over and things too far gone for that? There is a difference between a man who is frightened of emotions/feelings, doesn't know how to help his wife and needs very specific instructions with no ambiguity, and a man who is uninterested in his wife and contemptuous in his behaviour - and if he's routinely telling you to fuck off (if I remember correctly), he may well fall into the latter category in which case I quite understand your feeling that it is time to call it a day.
It certainly sounds as though you are carrying more of the domestic burden than is fair, unless there are extenuating circumstances such has his working hours, but I think you said he has more free time than you? Does he actually do any chores? (Sorry if I've missed this.) Does he have any understanding of how much you do to keep things going? (A book I keep meaning to read myself is Wifework by Gaby Hinsliff - l think - which may be one for your commute
)
Would it help to literally draw up a list of everything you do and how long it takes, and sit down with him to work out what he could take on, or is this pie-in-the-sky thinking? Do you have the funds to outsource anything? Sorry if this is unhelpful.
Our domestic load used to be very unbalanced but I have learned the hard way that if I want DP to do more, I have to spell this out to him and assign him specific tasks, as he only has any sense of initiative about certain things. But he is at least willing, which makes it easier.
If you think your relationship is worth saving, you could consider couples counselling but I would suggest only going with someone who is recommended - an experienced therapist worth their salt would be able to handle a manipulative man and call him on blaming the other person for everything, etc.
Good luck, whatever you decide.