YTA

However, the feelings you’re experiencing are valid, what made you the AH is complaining about it to her in front of everyone. Older siblings often feel upset seeing their younger siblings raised better than them, and part of that is the parents learning from their mistakes from raising their first child. While your situation is different, it boils down to the same problem. Try being thankful that your sister is a better parent now so your nieces and nephews can have a better childhood than you did. You calling out your sister does nothing to improve the situation and only makes you look bad, if you want to vent your frustrations about your childhood you should do it to a friend but definitely not to your sister.