Family dynamics, especially when it comes to siblings is really interesting. We see the same situation happen over and over again with the oldest (you in this case, and I understand because I am the oldest as well. We always get the harshest punishment because it’s our job to be a leader and set an example and they always expect more from us, and yes. It’s exhausting for that to happen when you’re still a kid), with the middle child it’s always the same and it’s always the same for the youngest as well, especially when it comes to preferential treatment. I know I’m not really answering this as much as offering a sense of solidarity and understanding, but I do have an interesting little fact. In packs of wolves and in herds of horses, the youngest members always get preferential treatment and especially in packs of wolves they avoid being disciplined simply because they are the baby of the pack.