Well and I know my opinion isn’t popular (and I was even told by a therapist once that just because I and my family doesn’t do something it doesn’t mean others shouldn’t), but nothing good comes out of gatherings involving excessive use of alcohol or other substances.

The only good thing about it is that when people sober up, they either don’t recall what happened or return to normal.

If such interactions are not uncommon in your family, I think none of it is irreparable. Maybe call your sister and tell her that you’d like to visit and that things got out of hand but you hope it could be fixed. Then call your niece and say the same. Then tell them all you have a hearing problem and it’s difficult fir you to interact at times. They might feel compassion. Tell them you love them and would like to mend the riff. On other hand you might just not say anything and let it all go. It might not be worth it

What do you feel in your heart?