Great question Felly!
Great answers too. I love ego = separation. So simple.
I don't know if I came into this life without one or it was empty, either way it has grown unchecked throughout my life. Separating as has been said or isolating me. An eye opener for me Felly was when my sponsor told me low SELF esteem and SELF pity are a huge part of ego (for some of us).
The BB mentions "freedom from bondage of self". That's a big part of what recovery is to me.
Sorry I don't know the Freud thing.