Are All Religions Man Made?

Many religions in the world have flaws and contradictions due to men having authored their scriptures and not God. So since when people come to know that some religions have these problems they think that all of the religions in the world must have the same problems. Is this right? Have you studied every single religion? Is there a religion which has no flaws and contradictions in it? Or is it possible that is there a religion who’s scripture was not authored by men? Is there a religion which has none of these problems? I took this clip from one of the episode of the Deen show in which Nouman Ali Khan talks about this Issue.