Even in the happiest adoption situations for some if not all people it must be very hard to be torn between not knowing where you come from, being frightened to learn the reality of where you come from and on discovery hating where you come from, or the opposite of that or something in between.
How do adopted children really cope with the reality of trying to forgive a mother who rejected them? If that is coupled with feeling rejected in their adoptive home it is a very tough situation for them. imo
Maggie a lot would depend on the upbringing of the adopted child as to whether he/she was " adjusted " to the facts about their bio-parents and the circumstances which brought about the adoption,always assuming that they'd been told.
With truth and understanding told to the child,the " burden " becomes lighter in later years,then the option of meeting up,or not is then reserved for the child's/adult's benefit in future years. Some don't have the desire to meet their bio parents,or do so out of curiosity.