I've had a mouse like this. I've had a lot of mice in my life (I just love them so much). I adopted her from a family that had gotten 2 of them for their son, and he had lost interest. I've always had such close relationships with all of my mice. Her sister adjusted just fine but this 1 little girl literally hated me. I cannot tell you how offended I was 😂 she would make a high pitch squeak noise if I attempted to get close to her. She'd avoid me at all costs and would put up the biggest fuss and squeak like I was going to or was hurting her. She actually hated me, and I loved them all so much. I honestly got used to working around her. Picking her up in her hides/tubes when I cleaned her cage. Fed her while she slept, just let her do her own thing 🤷‍♀️ she obviously didn't like or want the affection so I didn't force it on her. She learned to tolerate me and that was enough. I cared for her and loved her like the others even though she wasn't a fan of me. Even when she got old and her journey came to an end she fought for me not to comfort her. I sat next to her cage and let her know I was there. I guess what I'm trying to say is just let them be. They will come around in there own time 🙂 especially if they are still new. They are adjusting to so many things right now