You say “If God is so good and perfect then why do we have all of this evil and sadness in the world, why doesn’t the ‘Ever-all-mighty’ just stop allowing it”?
I reply “Because we asked for free will, and He granted us what we asked for. In that free will is the freedom to choose. It is also the freedom to choose Him”.
So when you ask why it is evil and war, pain, and suffering, understand it is because someone chose to start that, engage in it, and follow up on it. They chose not to choose Christ.
“All this {life} was ever meant to be, was a friendly conversation”. ~Sarayu, the Holy Spirit, ~The Shack.