According to Eastern Orthodoxy why did we inherit the sin of Adam and Eve? God is known as very just and he likes to have mercy on people.

God doesn't want people to inherit sins of their parents. So why did we inherit this very sin? What is so special about the sin of Adam and Eve?

I feel like that it's against justice because we didn't make it. It's also against having mercy because we inherited a sin which leads to death.
The sin is a damage we do to ourselves. Adam and Eve damaged themselves and we inherited this sin, like child inherits damage if his mother smokes or drinks alcohol during pregnancy.