These types of things are so misguided and silly. It’s not “in less than 20 hours”.
It’s after years of experience with navigating/mastering game mechanics, and then using that mastery in relation to your more recent in-depth knowledge of the milieu of the current meta. Compound that with knowing exactly which cards to craft in order to approximate a high tier meta deck, before eating through lower ranks of inexperienced players who don’t have the benefit of the underlying base of your game knowledge.
It’s insincere & almost patronizing for people to create this sort of content with the types of implications they’re obviously injecting into them. Obviously a brand new player who hasn’t spend a dime on the game isn’t going to be able to replicate it.