It was always said lovingly" Then you have NO reason to think it has anything to do with your emotional/mental problems now. I think it's a cute nickname. Lots of kids get nicknames like Bear or Pumpkin or Sissy.
Instead of looking for something or someone to blame, find yourself a good therapist to help you work through your issues.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.