Tell your mom that staying in an environment where you don't feel accepted and appreciated can hardly be a considered a place where you can develop a higher self esteem. I am sorry you are having a hard time. Maybe you are talking to the wrong person about this.
Talk to the coach of your team, and tell him/her how you are feeling unwelcomed there. A team is supposed to be supportive of each other. Being competitive means you compete with other teams, NOT with each other.
Have you ever heard the old saying "A team divided is a team conquered"? By not being supportive of each others efforts on the team, your team mates are defeating themselves, and if your coach wants to have an effective squad, he/she needs to unite the team, and part of that is knowing what is going on. As for your mom, I am afraid that you are right.
She can't speak out of both sides of her mouth at the same time. On one side she tells you, that you can come to her with your problems, and tell her things, and then with the other criticizes you for seeming weak. I hope your coach is a more supportive person than your mom is.
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.