In the end, if you were not happy before you were rich, it's unlikely you will be happy when you are (rich).
My two cents.
This is so true.
But what if you are unhappy because you aren't rich?
I don't think this can be the reason for someone to be truly unhappy.
Sometimes we have some deep personal problem in life, and we try to change everything else but the only thing that is really making us unhappy we don't change.
I have lived something like that few years ago... my 2 cc.
Money can make things more pleasant, but it won't solve our personal issues (but it will help solving them)