The word constructive means that the points made are useful to the person getting this criticism. So saying - "it's horrible, you can't write" - is not constructive, it gives no hints to the way someone might improve or change whatever they do. Saying "you make a lot of grammar errors such as ...." will help the person to improve their grammar.
Unfortunately it's not easy to be constructive as it requires from a reader (if we discuss the skill of writing) to actually look for ways they would improve the piece of writing instead of dismissing it here and now.
Constructive criticism is courteously pointing out how the writer might improve the peice of writing under consideration. It whopuld be positive and useful.
Constructive: "White text on a red background is difficult read, so you might consider a more traditional color scheme, like black on white. "This one is meant to be helpful, so it's constructive. Non-constructive: "Your stylistic choices would count as a crime in a just world."This one is hostile and completely unhelpful, so it's non-constructive.
Intent is what matters, though it's possible to be needlessly hostile in a constructive criticism.
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.