The less you worry about it, and the more you know the truth, the sooner you realize you were wasting precious energy. I know you're a kid and all, but yeah... ranks don't make the player.
He's right on one point. However, throw punishing will only give you an easier time in 25% of the matches you'll play, not 50%. If you wanna go for that cool majority, you'll have to adapt to each individual opponent swiftly with the optimal strategies you learned.
Cause they boost or they just play ranked a lot. I never cared for ranks, I just play in lobbies. So I'll always be an F rank. Lobbies are a lot more fun, unless you run into idiots. But that's a whole new topic.