How do you talk to your S/O?

Lately whenever I have a disagreement with my husband I’m always in the wrong. If I tell him he talks to me in a certain way that’s rude, goes against his word or even has actions I’m not happy with, he does not react well whenever I call him out on it. I make sure when I tell him something I don’t accuse him or raise my voice. I tell him in a calming way how I feel and he has a bad reaction. He says things like “ugh here we go again!!!!” Or “you’re seriously making it a bigger deal that it is”. And honestly I have valid points whenever I make my statements and it’s not to be a nag although he makes me feel like one. We are newly married and I’m not happy where this is heading because he acts like a child and not the amazing man I knew. I have an ache in my heart from how I feel about the way he doesn’t hear me out or consider my feelings. Whenever I ask him if he would feel the same if the roles we reversed he claims it would be completely okay with him and not bother him. It’s a total lie and if it’s not a lie, he seems to have no standards when it comes to the bare minimum respect. I feel so hurt and feel like I made a big mistake marrying him. I don’t know what to do or how to even talk to him. He wasn’t like this before!