To make everyone happy one must control everyone and everything. Which means end of free will. What’s the fun in that. Actually that’s nothing worth making.
Now if there is free will there is karma. Souls are numerous but limited. Which means rebirth.
Which also means previous life karma being forwarded to next one.
That also means some people even if being good in this life suffer due to previous lives.. and being bad enjoy due to previous karma..
There is a way to end all suffering that’s being free from the cycle of life and death. And the way to get that is being like God. Also God don’t only care about humans. If a human make an animal suffer he will also get the return package.
May be God was lonely and wanted to create something for fun. But surely he didn’t make people suffer for no reason. Free will makes us vulnerable to various sins which make us suffer.
Justice is what he does..
He never makes anyone suffer for no reason but can pardon a person who genuinely regrets and wants to improve.
The one who becomes like THE ONE gets free from this cycle
So the answer is God don’t make everyone happy because he is all powerful and thus gives justice.
If you believe in religion and God then there is better explanation for you.
It goes like this:
According to God there is only one happiness: Being one with God.
There is only one sadness: Being lost from God. (although you cant be lost literally because he always know where you are)
When we pray to God for worldly benefits. He may or may not give those.
Its all part of the play.
Afterall whole world is a lie. There is only one truth.
It goes on and on. We will soon publish a video regarding this topic.