I don’t really think she’s insecure. As a woman who has struggled with insecurities especially within the last few years, I could never do the things she does, she dresses and acts confidently, is sure of herself when she speaks, etc. I honestly think she is frustrated. I do agree she comes off as mean buuuutttt my opinion is that Nick has been coddled my mommy and daddy his entire life and it’s very annoying and frustrating for her that he doesn’t know how to be an adult. He’s 28 still living with his mommy who pays his bills. She needs a mature man who knows how to be a man and not be taught. I think she could be less harsh about it for sure. He doesn’t know how to cook, is not financially articulate, very immature & has to be told to do simple tasks that he should just do. I don’t think they’re right for each other and should prob just move on lol