Sick of my boyfriend

We have a 6mo together who wakes a lot at night. No matter how often she’s awake during the day. Whenever he watches her it’s worse at night because he gives her a little food and the second she starts getting messy he gets frustrated and gives up saying she doesn’t want it. I told him all the tips and tricks to it but he doesn’t listen to me. Tonight he’s telling me he thinks she needs to be seen by her dr because there must be something wrong with the formula because she wakes up at night. (This baby is FAR FROM failure to thrive) He goes on all the time how the kids he has in Germany didn’t act like this and how there is something wrong with our child. (He has 2 other kids from a previous marriage when he was in the military, he’s American) how American formula doesn’t work and blaming the formula on the fact he won’t just sit down n feed her or do it a couple times a day. Then he tells me that she wastes formula and water by letting a little out of the bottle (dr.brown) I’ve told him so many times those bottles just leak sometimes and they always have. Then he says, it’s not the bottle it’s her she just lets it leak. She 6mo 🙄 she doesn’t understand what wasting n all that shit is. Then my favorite is when he says “she isn’t my first baby I know what I’m talking about”. She isn’t my first either! I have a child from a previous relationship as well who is a lot younger that his 2 kids. I find it degrading honesty because everything I say I’m wrong and when he says that it feels like he’s saying well I have more kids than you so I know more than you. I could go on and on. I guess I just needed somewhere to vent because now I’m just sad and feel like I’m failing my 6mo 🙁

Edit for dopples:

I told him he is more than welcome to make the appointment and he won’t. So that shouldn’t fall on me to do because he doesn’t feel like it.