That is irrelevant, Lois has lead a priviliged life and has never really experienced failure. She has got everything she has ever wanted.
Compared to whom, exactly? How are we defining failure? She certainly hasn't had everything she ever wanted. For example, she wanted her father's love, which she felt she never really received. She wanted a nice normal relationship with a guy she liked, but ending up falling in love with the world's foremost hero. She frequently doesn't receive what she wants, but she adapts and moves on with life.
I think that one could argue that Lois received more attention than Lucy from their father, though the attention was usually negative. I guess it also says a lot about Lucy's character* that she envies the negative attention received by Lois.
*Though I refuse to take this story as a good example of Lucy's behavior, since it contradicts pretty much everything I thought I knew about the character.