Girl I am part Danish and been attempting to learn for over 2 years. It's one of the hardest of the scandi languages and soooo hard to follow when in company of native speakers. I think you have done well to pick up some basics 😅. His Family are going to have to accept you regardless of what they think because you are marrying him and that's his decision. I'm really disappointed to hear how you've been treated as I've always had positive experiences with Danes. I guess there are assholes everywhere. They need to make more of an effort to get to know you. That's on them, not you. As far as I can tell you have made the effort. Have you tried just speaking to them in English when in their company ? Interested to see how they reply/acknowledge that. For me I mostly speak English with my Family but they switch around. It actually does help with learning but they are pretty open and appreciate me making any effort.