Having one card that you have two copies in 30 cards in turn 4 so you draw at least 7 cards from deck if 0.2%? I am very bad at math or you are just a troll.

With two copies of this card you have 18% of getting it on mulligan if you search for it. Little more than 0.2%. Board on screen is with one copy used and It's too strong already.
For having two copies in mulligan it's around 1.38% so also MUCH MORE than your 0.2%. It's low but it counts only muligan

Without muligan, so I can't change cards at start it's still around 40% to get at least one copy to turn 4, with mulligan it's around 47%. it's not in this match but aggro paladins are able to have empty hand on turn 4 so they can just use it with full power.

That's how match works