Yes, some children can't allow the disruption in their thinking/lives to really see that their parents aren't. When we are children we are so dependent on parents and have to "accept" them to some degree in order to live and that can become all we know. Changing one's thinking or accepting that what we "have" isn't working and we have to go out and do something else, unknown to us, is very hard. It sounds like you are wishing for some "companionship"/validation in your own struggle with how you see your father. Your siblings , it sounds like, don't want to rock the boat/status quo.