We can’t choose our blood, but we can choose our family. I’m sorry yours is being shitty to you.
If this is newish behavior, then you may want to consider distancing yourself from them, give them time to come to their senses.
If this is just more of the same-old, same-old from them, then it might be time to consider making your own family. By that I mean being selective about who you keep and who you cull.
You are not required to keep in contact with horrible people, just because you happen to be related. There are plenty of other people out there who are worthy of your time and respect.
Damn, I wish I could upvote this more than once.