You did not. You were very much concerned with what was going on at home. You could never be completely comfortable playing with other children. You could not be fully there. Your concerns about your home problems clouded everything else in your life.
Adult children are either super responsible or super irresponsible.
Either you take it all on or you give it all up. There is no middle ground. You tried to please your parents, doing more and more, or you reached the point where you recognized it did not matter, so you did nothing. The alcoholic home appears to be a very loyal place. Family members hang in long after reasons dictate that they should leave.