I disagree that this is "the umps taking the bat out of his hands" or the stated point that this is something that will turn around on its own. The reason Moncada looks this bad in this number is that pitchers know THIS is an easy way to attack Moncada.
They know he's patient enough that if they throw good pitches early in the count, he may not attack them unless they make a mistake. If the pitcher gets ahead in the count, they also know that Moncada will not defend himself if the pitch is close, he will continue looking for a pitch he can drive. Moncada will not foul pitches off with 2 strikes to stay ahead if the pitch is close but unhittable, he will take that pitch. Other players will fight those pitches off or put them in play, Moncada won't.
So, if a pitcher gets ahead of Moncada, what do they do? They throw the ball just out of the strike zone a couple times and since Moncada won't defend himself, it's up to the quality of framing and how well the umpire sees it whether or not he strikes out. If they've got an 0-2 or 1-2 count, they can do that a few times and see if Moncada grabs some bench without him ever threatening to do damage.
If we replayed this season a hundred times, Moncada would still lead the league in this category. It's not because he's getting bad luck from the umps or that the umps just don't respect him (I guess it's possible there's a little bit of it in there it can't be ruled out completely), this is all about Moncada's approach. This is a major vulnerability for him. Unless there are robot umps adopted, any time he gets behind in the count, he's vulnerable to striking out looking because he won't defend on close pitches. You get ahead of him, you have a catcher that frames the ball acceptably, and you throw a pitch that is close, he'll grab some bench.
Until Moncada's approach when behind in the count improves, he will lead the league in this every year.