Just by hitting one card, the numerical and information advantage is completely extracted, and after that, all the cards drawn for 3 turns counting from the turn of the side that was hit are confirmed, and the corresponding monster is destroyed
A lot of events do happen, but on a greater scale, there is nothing major happening which is why I give a 7 to Story
That being said, I don't have that same luxury with the more obscure decks so generally speaking, unless there's a lore specific reason of limiting cards to certain quantities due to their uniqueness (for example only 1 copy of each Crystal Beast existing), 2 or 3 copies are acceptable in order to preserve the feeling of the deck as it appeared in the anime
The Japanese set was released in December 2019, and the English version was released just a few months later in February 2020
He's got Eradicating Aerosol for some strange reason (destroys all Insects...which he uses...) aaaand he has THIS: This card can tribute itself to summon any Insect monster that's in your hand