The matchmaking does not know which deck you queue up with.
How do you know that? Been at Blizzards design team and mechanics and have insiders knowledge? You saw with your own eyes the inner workings of the matchmaking? I seriously doubt that. Blizzard has reasons enough to exactly know which decks ae queued.
And what evidence do you have to prove that the matchmaking sets you up against a counter when you're winning to much. Oh, wait, you have absolutley no evidence beyond your feelings. If you want to be taken seriously record data, actually analyze what's going on and recording it, so you have some legs to stand on. You can't state something as a fact without having evidence to back it up.