Isn't it weird that parents and sister who pretend I don’t exist are upset that I ignore them?

My parents have never talked to or listened to me. I can’t think of a single actual conversation I‘ve had with them. They either ignored me, yelled at me, or, when we were around other people, were fake nice while still not hearing anything I said. My sister did and does this too. They legitimately taught me nothing. I barely know our native language and food, I don’t know anything about our family history, I didn’t know how to shower until my mid-teens, I even had to learn about periods from a teen magazine (not my mom or my sister who’s older) after having a panic attack thinking I was dying during my first period. [My parents also severely medically neglected me, but I won’t get into that now, it was just part of a pattern of ignoring me.]

In any case, now they want to hear from me?? Now it’s wrong to ignore family??? They didn’t want to hear from me, they didn’t want me in their vicinity, but now that I’ve given them the gift of my absence, they’re mad??? It’s sad and a little comical.