No longer want to be bothered

My s/o and I been together for some years and we have a baby together. He’s been supportive behind everything I do and is always there for me when I need him to be. Fast forward, my dad’s wife (step mom) is a travel agent and is planning a family cruise for next year. My s/o and I decided that we will be going and my mom insisted on baby sitting. This would be our first cruise together so I am excited about that and it’s a 1 week cruise. We paid our deposits and paid half for our room so it can be reserved. We don’t pay our next payment until December. Our deposit was $50 each and to reserve our room was $500 each. I informed his wife that we will be getting a balcony room with the ocean view. I love views which is why I want a balcony. My dad is trying to talk me out of the balcony because he claims it’s “too high” in prices than the other rooms, which is true but I want what I want. We’re paying for it ! Then I notice as time go by every time I have conversations with my dad it always turns into an argument because he always being so negative and mean. He never has nothing nice to say. Then he always wants to drag me and my s/o down and talk down on him. I’m starting to see and know that he doesn’t like my s/o just because of how he grew up and where he came from in life. I’m a first time mom so he always tries to shame me and bring me down as a mom and thinks I can’t do nothing with my life because I have a baby. I’m grown at that and he loves to talk to me like a kid but he doesn’t talk shit to my sister like he talks shit to me. He has so much respect for her than me. I can’t make my own decisions without him trying to control me and tell me what to do. Then gets mad when I do what I feel is best to the point he starts calling me names. Then as far as his wife, I don’t think she likes me as much as she use to ever since last year from an incident between me, my sister vs our dad. When I reach out to her she never answer me or respond and when she does, her excuse is that she’ll call me back but never do, as if she’s trying to avoid me and that I’m bothering her. And I realize when my dad and I argue he would also say that his wife is sick of me too. Today my dad called and like he always do, he love to get in my business just to talk shit about it instead of having a respectful civilize conversation. At this point, I feel like the vibe is completely off between me and them and I’m not sure if I even want to go on this cruise with them because of it. I know if my s/o and I go on this cruise, I know my dad is going to act shady as fuck and give me and my s/o a weird look because we’re here. I honestly don’t care if I can’t get the money back. I just don’t have time for that energy. Hopefully things are different there but I don’t know.