Family/Bd Rant

Stick with me here, it a long one… My fiancé and I have been together 5 years and have a 1 year old. He and my mom have a had a rocky past, long story short she’s made it clear she doesn’t think he’s good enough. It’s caused major relationship issues between my fiancé and I, causing many almost separations. I love her because she’s my mom but she’s generally a negative presence in our lives. I’ve done my best to create distance without cutting her out completely and it has improved our situation a lot recently. Today I called my mom to get an update on family and my fiancé listened in on the conversation. After I got off the phone he was upset because I guess I sound like her. I tried to get answers to what I did wrong and he just kept telling me how I talked/everything I said and I changed how I spoke when I was talking to her. He won’t give me solutions and would hardly let me get a word out trying to defend myself. I’m just so lost on how to handle this, I’ve changed so much to try to make this relationship work and it hurts my heart now that it seems like it was all in vain. I’m not even sure I’m actually looking for solutions here I guess I’m just hoping for support.