The reason I believe my generation has too much self-esteem is because my generation is considered the most self entitled and selfish generation. Many people in my generation believe that they deserve to have everything handed to them, instead of having to work for things. I think this would translate to being over confident, and my generation thinking they are immune from having to work for what they want.
My generation is lacking in self esteem. My generation has been held back by generations from before mine taking to much resources without putting enough in. My generation has to pay into social security for their whole lives but never receive it. My generation has worse wages per cost of living than any other generation. We lack self esteem because of it.