Something that was getting shared a lot once (not too sure how true) that the whole "lion is the king of the jungle" thing was pushed by the Church in Europe to counter the pagan cult of the bear.
The bear was basically worshiped as an embodiment of strength, saying that he's not the strongest tarnished his image.
Idk, if you dig a little deeper you will also read that the evidence of them being hunted on purpose isn't conclusive. Also the tiger ends up losing often.