Miri =( ***hugs*** if you want some. That sounds not only challenging but possibly leaning towar the emotionally abusive side... I'm sorry! I get that - what it is like to be teased about things that have been damaging - dealt with that in my own family too. I did finally have to stop contact for my own mental health (though I understand how challenging that is when you still want a relationship with the person (though hopefully healthy). Perhaps the only thing that can be said is to continue to work on boundaries, say to them what you will and won't allow, let the rest go, and work on both taking care of you while leaving the door open to them to join you when they can be healthy about it. Wish there were easy answers!!!
Glad you are here seeking support!
kiya