I know what you are getting at but that is something that happens all the time in MtG. Exploiting the meta has been a thing as long as the meta has been a concept in card games.
But ladder isn't the same thing as competitive play. On ladder you are still always going to play against Leper Gnome. You are going to see decks that make no sense given the environment. There's no weeding out process. You are just going to have to come to terms with a setting in which anyone can play anything at any time.