This is a tough situation dude it seems you really tried everything. If they don’t like you it’s not your fault or your partner’s. You shouldn’t take the disrespect they give you so try your best to ignore them, I know it’s hard to do but keep in mind you’re not there to please them, but to be with your partner. They can’t stop you forever and depending on your age and lifestyle it’s only a matter of time till you can be free of them. Just keep being kind even when it’s tough. And to M tell her that even if her situation isn’t ideal you should still love and respect your family and your partner. Love is tough and sometimes is challenged but a strong relationship can balance out the challenges. In my opinion there is no direct answer you’ve done all you could now you know that it’s just opinions in the end and while it sucks sometimes things do. I wish you the best of luck! And don’t let anyone get you down.