Does any older sibling go through this?

Recently I’ve gotten fed up with my families shit. I’ve noticed a pattern since I’ve gotten older. My grandma & I were arguing about how she only talks down to me & not any of my siblings her reason for it is because “I’m the oldest & I expect better of you” even though we’re all grown now, yet to this day she still does it. This past week my younger sister decided to make a post about me calling me scum in directly because I couldn’t do something for her that was completely out of my hands so I decided to not talk to her for a while & yet again because I’m her older sister I shouldn’t do that. Another thing my other sister recently got a job & even though I had been up with my child all night I’m expect to wake up early enough to give her a call to make sure she’s awake for her job because she likes to stay up all night talking on Facebook regardless of responsibilities she may have the next day. It’s such a normal thing in this family but I feel like this doesn’t normally happen in other families.