Sorry to hear you're having such a tough time.
I am in the process of writing up (full time - have done three years and am now in the first term of my writing up extension) and today I am really, really not enjoying it, but I have my ups and downs. I am in a related field to yours and am writing something which relates to my former area of practice. I like the empirical stuff - my interviews, my fossicking in archives, but more or less hate the theory. I have, I hope, done just about enough of the theory to get by.
Some random quick thoughts (not much time now), which may or may not help
-PhDs don't have to lead to jobs to be worthwhile. I don't think I necessarily want an academic career either. Maybe separate thinking about your future career from thinking about the Phd and whether to finish or not? Would seeing it as an end in itself and a worthwhile achievement in its own right help? Definitely separate your achievement from all the narcissism and nonsense - you can have something to say without being part of that.
-Read something that you really like and that's written in a voice you can relate to, and then write a paragraph or two in a similar style yourself. You have to find an academic voice, it's true, but there's no point aping a style you think is absurd.
-You do have something to say - it's just that you are too close to it to see what the interesting/revelatory bits are.
-If something was worthwhile, the cultural moment for it never really passes - you just need to find a slightly different lens - e.g. why did that seem so pressing then, what did it say about the times?
-You're pregnant! You're about to move house! Both these things are stopping you thinking clearly, cut yourself some slack.
Really have to get on now, but happy to chat more later. Hang on in there.