He is now telling DD "Mummy said she doesn't like you anymore." I know he's saying it as a joke but am feeling a bit fragile and wishing I hadn't mentioned formula!
He does WHAT?
You need to get rid of him. Perhaps she doesn't yet understand what he is saying (but perhaps she does!), but if that's how he talks to a baby, how will he talk to a toddler?
It is not only emotional abuse against you (you wish you had not uttered an opinion of your own? This is a red flag!), it is also something horrible to say to a child.
He forces you to breastfeed her, which makes you stressed out and desperate (not letting someone sleep is a method of torture!), and then blames you for not being happy enough about having a baby, when YOU do all the work?
Haven't read the whole thread, and hope you already did it, but in case you haven't: Stop doing anything in the household at all. Including preparing meals. If your OH works outside the house and can't cook for you, order pizza.
Start expressing milk so he can feed your DD at nights.
Then see if he persists in his opinion.
(If he refuses to take over all the other work, just put her on formula immediately. If he refuses to bottlefeed her, you know he's no support and you can get rid of him without losing anything much in the way of support.)